November 11, 2022

Y-Intercept - Explanation, Examples

As a learner, you are constantly working to keep up in school to avoid getting engulfed by topics. As parents, you are continually searching for ways how to motivate your children to succeed in school and beyond.

It’s particularly important to keep the pace in mathematics due to the fact that the concepts always founded on themselves. If you don’t understand a specific topic, it may plague you in next lessons. Comprehending y-intercepts is a perfect example of something that you will work on in mathematics time and time again

Let’s look at the foundation ideas about y-intercept and let us take you through some tips and tricks for solving it. If you're a mathematical whiz or beginner, this small summary will provide you with all the knowledge and instruments you must possess to get into linear equations. Let's dive right in!

What Is the Y-intercept?

To completely comprehend the y-intercept, let's imagine a coordinate plane.

In a coordinate plane, two straight lines intersect at a point called the origin. This point is where the x-axis and y-axis meet. This means that the y value is 0, and the x value is 0. The coordinates are noted like this: (0,0).

The x-axis is the horizontal line passing across, and the y-axis is the vertical line going up and down. Every axis is counted so that we can locate points along the axis. The numbers on the x-axis rise as we drive to the right of the origin, and the values on the y-axis increase as we move up along the origin.

Now that we have revised the coordinate plane, we can determine the y-intercept.

Meaning of the Y-Intercept

The y-intercept can be taken into account as the starting point in a linear equation. It is the y-coordinate at which the graph of that equation overlaps the y-axis. Simply put, it represents the value that y takes once x equals zero. Further ahead, we will illustrate a real-life example.

Example of the Y-Intercept

Let's assume you are driving on a long stretch of road with a single path going in respective direction. If you begin at point 0, where you are sitting in your car right now, then your y-intercept would be equal to 0 – considering you haven't moved yet!

As you start you are going the track and picking up momentum, your y-intercept will increase before it archives some higher number when you reach at a designated location or halt to induce a turn. Thus, when the y-intercept may not look particularly applicable at first glance, it can offer details into how things transform over a period of time and space as we travel through our world.

Therefore,— if you're at any time stuck attempting to comprehend this theory, keep in mind that just about everything starts somewhere—even your trip through that straight road!

How to Discover the y-intercept of a Line

Let's consider regarding how we can discover this number. To help with the method, we will make a synopsis of few steps to do so. Then, we will give you some examples to illustrate the process.

Steps to Find the y-intercept

The steps to locate a line that goes through the y-axis are as follows:

1. Search for the equation of the line in slope-intercept form (We will dive into details on this later in this tutorial), that should appear something like this: y = mx + b

2. Put 0 as the value of x

3. Solve for y

Now once we have gone over the steps, let's see how this procedure will function with an example equation.

Example 1

Find the y-intercept of the line explained by the formula: y = 2x + 3

In this example, we can replace in 0 for x and solve for y to find that the y-intercept is the value 3. Consequently, we can say that the line crosses the y-axis at the coordinates (0,3).

Example 2

As one more example, let's assume the equation y = -5x + 2. In this case, if we place in 0 for x once again and figure out y, we find that the y-intercept is equal to 2. Therefore, the line crosses the y-axis at the point (0,2).

What Is the Slope-Intercept Form?

The slope-intercept form is a method of depicting linear equations. It is the most popular kind used to depict a straight line in mathematical and scientific uses.

The slope-intercept equation of a line is y = mx + b. In this function, m is the slope of the line, and b is the y-intercept.

As we saw in the last section, the y-intercept is the coordinate where the line crosses the y-axis. The slope‌ is a measure of the inclination the line is. It is the rate of deviation in y regarding x, or how much y shifts for each unit that x shifts.

Now that we have went through the slope-intercept form, let's check out how we can use it to locate the y-intercept of a line or a graph.


Find the y-intercept of the line described by the equation: y = -2x + 5

In this equation, we can observe that m = -2 and b = 5. Consequently, the y-intercept is equal to 5. Consequently, we can conclude that the line crosses the y-axis at the coordinate (0,5).

We can take it a step further to depict the angle of the line. In accordance with the equation, we know the slope is -2. Place 1 for x and figure out:

y = (-2*1) + 5

y = 3

The answer tells us that the next coordinate on the line is (1,3). Whenever x changed by 1 unit, y replaced by -2 units.

Grade Potential Can Guidance You with the y-intercept

You will review the XY axis over and over again across your math and science studies. Theories will get more complicated as you progress from working on a linear equation to a quadratic function.

The moment to master your understanding of y-intercepts is now before you straggle. Grade Potential gives experienced teacher that will support you practice finding the y-intercept. Their customized interpretations and work out problems will make a positive difference in the outcomes of your test scores.

Anytime you think you’re lost or stuck, Grade Potential is here to assist!