Question

Help!
Which of the following equations describes the graph?

a. y=3x^2+4
b. y=-3x^2-4
c. y=-3x^2+4
d. y=3x^2-4

Answer 1

it opens down, so the leading coefficient is negative
that rules out A and D

Answer 2

what do you see on the graph where \(x=0\) i.e where does the graph cross the y axis?

Answer 3

Ok i think the answer is c because the y axis is positive 4 and since its going downwards it is going to be a negative which is -3x

Answer 4

@satellite73

Answer 5

yes, exactly
it is almost always C anyways

Answer 6

ok so the answer is c

Answer 7

yup

Answer 8

thank you