November 11, 2022

Y-Intercept - Definition, Examples

As a learner, you are continually looking to keep up in school to avert getting overwhelmed by subjects. As parents, you are constantly searching for ways how to support your kids to succeed in academics and after that.

It’s particularly important to keep up in mathematics because the ideas always founded on themselves. If you don’t comprehend a particular lesson, it may haunt you in next lessons. Understanding y-intercepts is the best example of something that you will revisit in math time and time again

Let’s look at the foundation ideas regarding the y-intercept and show you some tips and tricks for solving it. Whether you're a mathematical wizard or just starting, this introduction will equip you with all the knowledge and tools you must possess to dive into linear equations. Let's dive right in!

What Is the Y-intercept?

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

In a coordinate plane, two straight lines intersect at a section called the origin. This section 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 through, and the y-axis is the vertical line going up and down. Every single axis is numbered so that we can locate points along the axis. The counting on the x-axis grow as we shift to the right of the origin, and the values on the y-axis grow 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 starting point in a linear equation. It is the y-coordinate at which the coordinates of that equation crosses the y-axis. In other words, it portrays the number that y takes while x equals zero. After this, we will explain a real-life example.

Example of the Y-Intercept

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

As you start traveling down the road and started gaining speed, your y-intercept will increase unless it reaches some higher value when you reach at a destination or halt to induce a turn. Thus, once the y-intercept might not look typically applicable at first look, it can give insight into how things change eventually and space as we shift through our world.

Therefore,— if you're ever stranded attempting to understand this concept, bear in mind that almost everything starts somewhere—even your trip through that long stretch of road!

How to Locate the y-intercept of a Line

Let's consider regarding how we can find this number. To guide with the process, we will create a summary of a handful of steps to do so. Then, we will give you some examples to illustrate the process.

Steps to Discover 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 afterwards in this article), that should look as same as this: y = mx + b

2. Plug in 0 for x

3. Work out y

Now once we have gone through the steps, let's take a look how this process will work with an example equation.

Example 1

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

In this example, we can plug in 0 for x and figure out y to discover that the y-intercept is the value 3. Consequently, we can state that the line intersects the y-axis at the point (0,3).

Example 2

As additional example, let's assume the equation y = -5x + 2. In this case, if we replace in 0 for x yet again and figure out y, we find that the y-intercept is equal to 2. Consequently, the line goes through the y-axis at the coordinate (0,2).

What Is the Slope-Intercept Form?

The slope-intercept form is a way of depicting linear equations. It is the commonest form utilized to express 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 portion, the y-intercept is the coordinate where the line goes through the y-axis. The slope‌ is a measure of the inclination the line is. It is the unit of shifts in y regarding x, or how much y changes for every unit that x changes.

Now that we have reviewed the slope-intercept form, let's observe how we can use 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 see 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 could take it a step further to illustrate the inclination of the line. Founded on the equation, we know the slope is -2. Plug 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 Help You with the y-intercept

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

The time to master your comprehending of y-intercepts is now prior you lag behind. Grade Potential offers expert instructors that will support you practice finding the y-intercept. Their customized explanations and work out problems will make a good difference in the results of your test scores.

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