November 11, 2022

Y-Intercept - Meaning, Examples

As a student, you are continually looking to keep up in class to avert getting engulfed by topics. As guardians, you are always investigating how to encourage your kids to prosper in academics and beyond.

It’s specifically essential to keep up in math due to the fact that the theories always founded on themselves. If you don’t grasp a particular lesson, it may hurt you in future lessons. Understanding y-intercepts is a perfect example of something that you will work on in mathematics over and over again

Let’s go through the fundamentals regarding the y-intercept and take a look at some tips and tricks for working with it. Whether you're a mathematical wizard or novice, this preface will equip you with all the things you need to learn and tools you must possess to tackle linear equations. Let's get into it!

What Is the Y-intercept?

To completely grasp the y-intercept, let's think of a coordinate plane.

In a coordinate plane, two perpendicular lines intersect at a section called the origin. This junction is where the x-axis and y-axis link. This means that the y value is 0, and the x value is 0. The coordinates are written like this: (0,0).

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

Now that we have gone over the coordinate plane, we can specify the y-intercept.

Meaning of the Y-Intercept

The y-intercept can be thought of as the initial point in a linear equation. It is the y-coordinate at which the coordinates of that equation overlaps the y-axis. In other words, it portrays the value that y takes once x equals zero. Next, we will show you a real-world example.

Example of the Y-Intercept

Let's assume you are driving on a straight track with a single lane runnin in both direction. If you start at point 0, location you are sitting in your vehicle right now, subsequently your y-intercept would be equivalent to 0 – given that you haven't shifted yet!

As you begin driving down the road and picking up momentum, your y-intercept will increase before it reaches some greater value once you arrive at a designated location or stop to induce a turn. Therefore, when the y-intercept may not look especially applicable at first glance, it can give insight into how objects change over time and space as we shift through our world.

Hence,— if you're always stuck attempting to comprehend this theory, bear in mind that nearly everything starts somewhere—even your trip down that long stretch of road!

How to Locate the y-intercept of a Line

Let's comprehend about how we can discover this number. To help with the process, we will make a synopsis of few steps to do so. Thereafter, we will provide some examples to illustrate the process.

Steps to Locate the y-intercept

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

1. Locate the equation of the line in slope-intercept form (We will go into details on this later in this tutorial), which should look something like this: y = mx + b

2. Plug in 0 for x

3. Figure out y

Now that we have gone over the steps, let's check out how this procedure would function with an example equation.

Example 1

Locate the y-intercept of the line explained by the equation: y = 2x + 3

In this instance, we can replace in 0 for x and work out 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 consider the equation y = -5x + 2. In this case, if we replace in 0 for x once again and work out y, we discover that the y-intercept is equal to 2. Therefore, the line goes through the y-axis at the point (0,2).

What Is the Slope-Intercept Form?

The slope-intercept form is a method of representing linear equations. It is the commonest form used to depict a straight line in scientific and mathematical applications.

The slope-intercept formula 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 checked in the previous section, the y-intercept is the coordinate where the line intersects the y-axis. The slope‌ is a scale of how steep the line is. It is the rate of deviation in y regarding x, or how much y changes for every unit that x changes.

Since we have revised the slope-intercept form, let's see how we can employ it to discover the y-intercept of a line or a graph.


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

In this instance, we can observe that m = -2 and b = 5. Thus, the y-intercept is equal to 5. Therefore, we can state that the line crosses the y-axis at the point (0,5).

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

y = (-2*1) + 5

y = 3

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

Grade Potential Can Support You with the y-intercept

You will revise the XY axis repeatedly during your science and math studies. Concepts will get more difficult as you move from solving a linear equation to a quadratic function.

The moment to peak your grasp of y-intercepts is now before you fall behind. Grade Potential offers experienced instructors that will help you practice finding the y-intercept. Their tailor-made interpretations and practice problems will make a positive difference in the outcomes of your exam scores.

Whenever you feel stuck or lost, Grade Potential is here to help!