Question

For the graph of the quadratic equation f(x)=x^2+2x-8, which of the following is true?
a. the graph opens downward
b. the vertex of the graph is (-1,-9)
c. the x-intercepts are (4,0) and (-2,0)
d. The graph does not have any y-intercept

Answer 1

do you know how to graph it?

Answer 2

no i dont

Answer 3

take some values
example:
solve it for
f(-2)
f(-1)
f(0)
f(1)
f(2)
... then when you have points, sketch then on X Y coordinates, then join those points...

can you solve it for f(-2) ?