To find the intercepts of a rational function, you start with the y-intercept.
This is the point where the graph meets the y-axis.
To find this point, you need to figure out what happens when .
Just put into your function.
For example, if your function looks like this: , then to find the y-intercept, you do this:
Now, let's move on to the x-intercept.
This is where the graph hits the x-axis or where .
To find the x-intercept, you set your entire function equal to zero and solve for .
Most of the time, all you need to do is set the numerator equal to zero.
As long as the denominator isn’t zero at that x value, a fraction is zero when the numerator is zero.
And that’s all there is to it!
Happy graphing!
To find the intercepts of a rational function, you start with the y-intercept.
This is the point where the graph meets the y-axis.
To find this point, you need to figure out what happens when .
Just put into your function.
For example, if your function looks like this: , then to find the y-intercept, you do this:
Now, let's move on to the x-intercept.
This is where the graph hits the x-axis or where .
To find the x-intercept, you set your entire function equal to zero and solve for .
Most of the time, all you need to do is set the numerator equal to zero.
As long as the denominator isn’t zero at that x value, a fraction is zero when the numerator is zero.
And that’s all there is to it!
Happy graphing!