Question

For the function f(x) = -x^2 - 2x - 8, (a) determine whether the graph opens upward or downward, (b) find the axis of symmetry, (c) find the vertex, (d) find the y-intercept, and (e) graph the function.

Answer 1

a is <0 so it opens downward.

Answer 2

f'(x)= -2 x -2=0 if x =1
x=1 is the axis of symmetry

Answer 3

The vertex is (1,f(1))= -11

Answer 4

thank you :)

Answer 5

yw