Question

Identify the quadratic function from the choices below whose parabola opens upward.
A. y= 3x-5x^2
B. y= 4x^2-6x-2
C. y= 7x-3x^2+7
D. y= 100-4x^2

Answer 1

y=ax^2+bx+c
if a is negative, then the parabola opens down.
if a is positive, then the parabola opens up.

Answer 2

How do i find "a"?

Answer 3

a is in front of x^2

Answer 4

okay

Answer 5

as shown here y=ax^2+bx+c

Answer 6

so identify what your a 's are in the choices

Answer 7

3,4,7, and 100?

Answer 8

-5,4,-3,-4

Answer 9

I said look in front of x^2 not any other variable part

Answer 10

you will all the a's above are negative except one

Answer 11

oh okay!thank u!