What is the y-intercept for x^3-3x^2+4?

Question

I don't know.

Answer 1

In order to find the y-intercept, we need to set x = 0, so:

y = 0³ - 3 * 0² + 4

y = 0 - 3 * 0 + 4

y = 0 - 0 + 4

y = 4

 

So the y-intercept is at (0, 4).

Answer 2

Jane, remember that all along the y-axis, x = 0. 

 

So, we know that our point will be (0,y). We just need to find the y when x = 0. We plug 0 in for every x in our equation.

 

y = 0³ - 3(0²) + 4

y = 0 - 0 + 4

y = 4

 

Depending on how your teacher wants the answer, it's either y = 4 or (0,4).

 

Hope this helps!