Question

The graph of which equation is shown below?

Answer 1

y = −x^2 + 2x − 3

y = −x^2 − 2x − 3

y = x^2 + 2x − 3

y = x^2 − 2x − 3

Answer 2

hint:the zeros of these functions are 1 and -3

Answer 3

so it would be the second one?

Answer 4

if plugging in x = -3 and 1 give 0 then yes

Answer 5

The parabola opens upwards. So the coefficient of x^2 has to be positive. Quickly you can rule out two choices.

Answer 6

right

Answer 7

i can rule out A and B

Answer 8

yes - now try the substitutions

Answer 9

does this go with the formula y=mx+b?

Answer 10

oh no it doesnt that finding slope intercept

Answer 11

ok the answer is x^2 +2x -3

Answer 12

f(1) for 3rd option is (1)^2 + 2(1) - 3 = 0
f(-3) = ?

Answer 13

correct