Question

Which graph matches the equation y = -(x+2)2 ?
A)
B)
C)
D)

Answer 1

For y = -(x+2)^2
the curve should have a maximum (leading coefficient is negative)
It should have a double root, i.e. tangent to the x-axis)
and the root should be -2 (x+2=0).

Answer 2

would it be graph B ?

Answer 3

B is not tangent to the x-axis, so it does not have a double root required in the question.

Answer 4

C ?

Answer 5

The root is given by (x+2)=0, so x=-2.
C has a root of +2.
That doesn't leave you too many choices!

Answer 6

okay so it would have to be A

Answer 7

Great!

Answer 8

thank you

Answer 9

You're welcome!