November 11, 2022

Y-Intercept - Meaning, Examples

As a learner, you are continually seeking to keep up in class to avert getting swamped by topics. As guardians, you are continually researching how to support your kids to succeed in academics and beyond.

It’s particularly essential to keep up in math due to the fact that the theories always founded on themselves. If you don’t grasp a specific topic, it may haunt you for months to come. Understanding y-intercepts is the best example of theories that you will use in mathematics repeatedly

Let’s go through the fundamentals regarding the y-intercept and take a look at some handy tips for solving it. Whether you're a mathematical wizard or beginner, this preface will enable you with all the knowledge and tools you need to tackle linear equations. Let's get into it!

What Is the Y-intercept?

To entirely grasp the y-intercept, let's picture a coordinate plane.

In a coordinate plane, two straight lines intersect at a section to be stated as the origin. This section 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 noted like this: (0,0).

The x-axis is the horizontal line traveling through, and the y-axis is the vertical line going up and down. Every axis is counted so that we can identify a points along the axis. The numbers on the x-axis rise as we shift to the right of the origin, and the numbers on the y-axis increase as we drive up along 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 taken into account as the starting point in a linear equation. It is the y-coordinate at which the graph of that equation intersects the y-axis. In other words, it portrays the number that y takes once x equals zero. Next, we will show you a real-life example.

Example of the Y-Intercept

Let's think you are driving on a long stretch of highway with one lane going in both direction. If you start at point 0, location you are sitting in your vehicle right now, then your y-intercept would be equal to 0 – since you haven't moved yet!

As you initiate traveling down the road and picking up momentum, your y-intercept will increase unless it reaches some greater value when you arrive at a destination or stop to make a turn. Therefore, while the y-intercept might not appear especially relevant at first sight, it can give details into how objects transform over time and space as we move through our world.

Hence,— if you're always puzzled attempting to get a grasp of this concept, bear in mind that just about everything starts somewhere—even your travel down that straight road!

How to Discover the y-intercept of a Line

Let's consider about how we can locate this value. To support you with the process, we will outline a handful of steps to do so. Thereafter, we will offer some examples to demonstrate the process.

Steps to Discover the y-intercept

The steps to locate a line that intersects 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 further ahead), that should appear something like this: y = mx + b

2. Plug in 0 for x

3. Solve for y

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

Example 1

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

In this instance, we could substitute in 0 for x and figure out y to discover that the y-intercept is the value 3. Therefore, we can state that the line intersects the y-axis at the coordinates (0,3).

Example 2

As another example, let's consider the equation y = -5x + 2. In this case, if we plug in 0 for x once again and figure out y, we discover that the y-intercept is equal to 2. Therefore, the line intersects the y-axis at the coordinate (0,2).

What Is the Slope-Intercept Form?

The slope-intercept form is a technique of depicting linear equations. It is the commonest form employed to express a straight line in scientific and mathematical subjects.

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

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

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


Detect the y-intercept of the line signified by the equation: y = -2x + 5

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

We could take it a step further to illustrate the angle of the line. Based on the equation, we know the inclination is -2. Place 1 for x and calculate:

y = (-2*1) + 5

y = 3

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

Grade Potential Can Guidance You with the y-intercept

You will revisit the XY axis over and over again across your math and science studies. Ideas will get more complicated as you progress from solving a linear equation to a quadratic function.

The time to peak your understanding of y-intercepts is now prior you straggle. Grade Potential gives experienced tutors that will help you practice finding the y-intercept. Their personalized explanations and practice problems will make a good difference in the results of your exam scores.

Whenever you believe you’re stuck or lost, Grade Potential is here to guide!