Question

The graph of a quadratic equation opens down when the value of __ is negative.

a
b
c

Answer 1

@Liz_Beauty45

Answer 2

Ax^2 + Bx + C is the form if that helps

Answer 3

it doesnt really but thanks anyways

Answer 4

@alivejeremy

Answer 5

Okay, think about this: What does a,b, and c signify in the equation? See which of these take part in defining the slope.

Answer 6

so a or b

Answer 7

Maybe A ?

Answer 8

A would make sense i guess if you really think about it

Answer 9

if a is negative

Answer 10

in
\[ax ^{2}+bx +c\]
if a <0

Answer 11

:P I plotted the graphs
x^2+2x+1 (opens upward),
x^2-2x+1 (opens upward),
-x^2+2x+1 (opens downward),
-x^2-2x+1 (opens downward),
on wolframalpha.

Answer 12

So yea, it seems that the coefficient of x^2 (A) is the cause of the upward/downward facing of the graph. :P