Question

Which is the correct equation for this line?

Answer 1

ANSWER

C.


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

Step-by-step explanation

The roots of the graph are;

x=-1 and x=3.

The factors of the function are,


`y = a(x + 1)(x - 3)`

To find the value of a, we substitute the y-intercept (0,3).


`3= a(0+ 1)(0 - 3)`


`3 = - 3a`


`a = - 1`

The correct equation is therefore,


`y = - (x + 1)(x - 3)`