SOLUTION: Which number in the equation y = -2(x – 5)2 – 7 causes a vertical expansion (stretching?

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Question 1080043: Which number in the equation y = -2(x – 5)2
– 7 causes a vertical expansion (stretching?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The -2, the number in front of the (x-5)^2
graph%28300%2C300%2C-10%2C10%2C-30%2C10%2C-2%28x-5%29%5E2-7%2C-0.5%28x-5%29%5E2-7%29
graph of the -2 and making it -1/2.