Question

Help please

Answer 1

Hint:
If vertex of a parabola is at (h,k), then it's equation is
\(y=a(x-h)^2+k\)
a is a constant to be determined.
h=x-coord. of vertex
k=y-coord. of vertex

Answer 2

3.5=a(7-6)^2+1.5

Answer 3

Exactly. So you found it! :)

Answer 4

Oh wow thanks!!!!

Answer 5

You did a good job! Well done!
You're welcome!

Answer 6

C right?

Answer 7

Because 1^2 is 1

Answer 8

I don't work with letter choices.
But you need to match h and k with the given choices.

Answer 9

Oh okay so match h and k

Answer 10

@zarkam21
Do you know what values of h and k (coordinates of the vertex) are?

Answer 11

Look at the vertex of the diagram and tell me the coordinates of the vertex, please.

Answer 12

H=6
K=1.5
X=7
Y=3.5

Answer 13

@mathmate Ufhm, you're disappearing on me now, how could you Haha =)

Answer 14

Sorry, I usually go around my questions, and if there is no response, then I have to go and continue my other chores! lol

Good, you would need 7 and 3.5 to find that a=2.
However, you could also have identified the choice of answer by h and k alone.
Which one do you think fits h=6 and k=1.5?
Compare the equation y=a(x-h)+k with each of the choices.

Answer 15

y=2(x-6)^2+1.5

Answer 16

Exactly! You got it. Well done!