November 11, 2022

Y-Intercept - Explanation, Examples

As a learner, you are always working to keep up in class to avert getting swamped by subjects. As guardians, you are continually searching for ways how to motivate your children to be successful in academics and furthermore.

It’s particularly essential to keep the pace in math because the concepts always build on themselves. If you don’t comprehend a particular topic, it may hurt you for months to come. Comprehending y-intercepts is a perfect example of topics that you will revisit in mathematics over and over again

Let’s look at the fundamentals regarding the y-intercept and let us take you through some tips and tricks for working with it. Whether you're a math wizard or beginner, this preface will equip you with all the knowledge and instruments you must possess to tackle linear equations. Let's dive right in!

What Is the Y-intercept?

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

In a coordinate plane, two straight lines intersect at a junction to be stated as the origin. This junction 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 traveling through, and the y-axis is the vertical line traveling up and down. Each axis is counted so that we can locate points on the plane. The vales on the x-axis increase as we drive to the right of the origin, and the values on the y-axis grow 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 initial point in a linear equation. It is the y-coordinate at which the graph of that equation overlaps the y-axis. Simply put, it portrays the value that y takes once x equals zero. Next, we will illustrate a real-world example.

Example of the Y-Intercept

Let's imagine you are driving on a long stretch of road with a single path runnin in respective direction. If you begin at point 0, where you are sitting in your vehicle this instance, therefore your y-intercept would be similar to 0 – considering you haven't moved yet!

As you begin you are going the track and started gaining speed, your y-intercept will increase until it archives some greater value when you reach at a destination or stop to induce a turn. Consequently, once the y-intercept may not look particularly applicable at first sight, it can give insight into how things transform over a period of time and space as we shift through our world.

So,— if you're ever puzzled trying to understand this theory, bear in mind that nearly everything starts somewhere—even your journey through that long stretch of road!

How to Find the y-intercept of a Line

Let's think about how we can discover this number. To support you with the process, we will make a synopsis of handful of steps to do so. Then, we will give you some examples to show you the process.

Steps to Discover the y-intercept

The steps to discover a line that intersects the y-axis are as follows:

1. Locate the equation of the line in slope-intercept form (We will expand on this further ahead), which should look as same as this: y = mx + b

2. Plug in 0 for x

3. Calculate the value of y

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

Example 1

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

In this instance, we can substitute in 0 for x and solve for y to discover that the y-intercept is equal to 3. Thus, we can say that the line goes through the y-axis at the point (0,3).

Example 2

As another example, let's consider the equation y = -5x + 2. In such a case, if we place in 0 for x one more time and solve for y, we discover that the y-intercept is equal to 2. Consequently, 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 representing linear equations. It is the cost common form utilized to represent a straight line in mathematical and scientific uses.

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 went through in the previous portion, the y-intercept is the coordinate where the line goes through the y-axis. The slope‌ is a measure of how steep the line is. It is the unit of deviation in y regarding x, or how much y changes for each unit that x moves.

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


Discover 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. Thus, the y-intercept is equal to 5. Consequently, we can conclude that the line intersects the y-axis at the point (0,5).

We could take it a step further to explain the slope of the line. Founded on the equation, we know the slope is -2. Replace 1 for x and calculate:

y = (-2*1) + 5

y = 3

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

Grade Potential Can Help You with the y-intercept

You will review the XY axis repeatedly throughout your math and science studies. Ideas will get further complicated as you progress from solving a linear equation to a quadratic function.

The time to peak your understanding of y-intercepts is now before you lag behind. Grade Potential provides expert instructors that will support you practice finding the y-intercept. Their customized explanations and work out problems will make a positive distinction in the results of your test scores.

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