November 11, 2022

Y-Intercept - Meaning, Examples

As a student, you are constantly working to keep up in school to prevent getting engulfed by topics. As guardians, you are constantly researching how to encourage your kids to prosper in school and furthermore.

It’s especially critical to keep the pace in math reason being the theories always build on themselves. If you don’t grasp a particular lesson, it may haunt 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 go through the fundamentals about y-intercept and let us take you through some tips and tricks for working with it. If you're a math whiz or just starting, this preface will provide you with all the information and tools you require to tackle linear equations. Let's jump directly to it!

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 known as the origin. This junction is where the x-axis and y-axis join. 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 passing across, and the y-axis is the vertical line traveling up and down. Each axis is numbered so that we can specific points along the axis. The vales on the x-axis increase as we drive 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 revised the coordinate plane, we can determine the y-intercept.

Meaning of the Y-Intercept

The y-intercept can be thought of as the starting point in a linear equation. It is the y-coordinate at which the graph of that equation intersects the y-axis. Simply said, it portrays the value that y takes when x equals zero. After this, we will illustrate a real-life example.

Example of the Y-Intercept

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

As you initiate you are going the road and picking up momentum, your y-intercept will increase until it reaches some greater value when you arrive at a destination or stop to induce a turn. Thus, while the y-intercept may not appear particularly important at first glance, it can offer details into how objects transform over a period of time and space as we shift through our world.

Hence,— if you're at any time puzzled attempting to understand this concept, bear in mind that just about everything starts somewhere—even your trip through that long stretch of road!

How to Locate the y-intercept of a Line

Let's think regarding how we can locate this number. To support you with the procedure, we will make a synopsis of some steps to do so. Thereafter, we will offer some examples to illustrate the process.

Steps to Locate the y-intercept

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

1. Find the equation of the line in slope-intercept form (We will dive into details on this later in this tutorial), which should look as same as this: y = mx + b

2. Put 0 as the value of x

3. Solve for y

Now that we have gone over the steps, let's take a look how this method will work with an example equation.

Example 1

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

In this example, we can plug in 0 for x and solve for y to locate that the y-intercept is equal to 3. Therefore, we can state that the line goes through the y-axis at the coordinates (0,3).

Example 2

As additional example, let's consider the equation y = -5x + 2. In this case, if we place in 0 for x once again and solve for y, we get 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 method of representing linear equations. It is the commonest form utilized to convey 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 previous portion, the y-intercept is the coordinate where the line intersects the y-axis. The slope‌ is a scale of the inclination the line is. It is the rate of change in y regarding x, or how much y changes for each unit that x moves.

Now that we have revised the slope-intercept form, let's see how we can utilize it to locate the y-intercept of a line or a graph.


Discover 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. Consequently, we can say that the line crosses the y-axis at the point (0,5).

We can take it a step higher to illustrate the inclination of the line. Based on the equation, we know the inclination is -2. Place 1 for x and work out:

y = (-2*1) + 5

y = 3

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

Grade Potential Can Help You with the y-intercept

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

The moment to master your grasp of y-intercepts is now before you lag behind. Grade Potential offers expert tutors that will support you practice finding the y-intercept. Their tailor-made interpretations and solve problems will make a good distinction in the results of your examination scores.

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