SOLUTION: A quadratic function has a vertex at (-3,4) and a y-intercept at 1. What is the vertical stretch factor ? I'm guessing 1/3 or 3 but I'm not sure :( Please help me :)

Question 118943: A quadratic function has a vertex at (-3,4) and a y-intercept at 1. What is the vertical stretch factor ? I'm guessing 1/3 or 3 but I'm not sure :( Please help me :)
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
given:
vertex at (,)..=> and
y-intercept at
we will need to use this formula to find :
}

First use vertex form to find :

��

Now use the formula to find a:

�� the stretch/compression factor
Here is the graph:

Solved by pluggable solver: Completing the Square to Get a Quadratic into Vertex Form

Error: the leading coefficient "a" cannot be equal to zero.

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