Question

[9.01] The graph of which quadratic equation is shown below?


y = x2 − 2x − 3

y = x2 + 2x − 3

y = −x2 + 2x − 3

y = −x2 − 2x − 3

Answer 1

Those are the 4 possible answers and here is an image of the graph.

Answer 2

it is a parabola facing up, so the leading coefficient must be positive. therefore ignore the last two

Answer 3

since zeros are at -3 and 1 you know it factors as
\[(x+3)(x-1)\] multiply out and see that you get the first one

Answer 4

(x+3)(x-1)
foil it out

Answer 5

x^2 +2x -3

Answer 6

oops not the first one. the second one!