Question

Which of the following equations could be the function pictured in the graph?

A. y = ( x - 1 ) ( x + 3 )

B. y = ( x + 1 ) ( x - 3)

C. y = ( x + 1 ) (x + 3)

D. y = ( x + 1 ) ( x - 1 )

Answer 1

Answer: B

Explanation:

We can find the correct equation by finding the x-intercepts, or the zeroes.

To find the x-intercept, you have to make the y's value = 0. If y on the graph is zero, the x-intercept is (-1,0) and (3,0).

Then look at the equations and see which one has -1 and 3 as the values of x.

The answer is B.