Answer:
4. y-intercept = -9, answer option a
3. roots are x = 4 and -6, answer option a
Explanation:
4. definition of y-intercept: where the function intersects the y-axis
this occurs where the x-coordinate = 0
that means the y-intercept = -9, given in the table
3. roots are zeroes of the function, where it intersects the x-axis
to find, set the function = 0
0 = -3(x-4)(x+6)
the values of x that make this equal to zero can be found by setting
x-4 = 0
and
x+6 = 0
so x = 4 and -6