algebraically determine the x-and y- intercepts of each functions

Question

B) y=x2 -8x

Answer 1

The x-intercept is where y = 0 so you get

 

x² - 8x = 0

 

x(x-8) = 0

 

x = 0 or x = 8

 

They are at the points (0,0) and (8,0).

 

The y-intercept is where x = 0 so you get

 

y = 0² - 2·0 = 0

 

It is at the point (0,0).