SOLUTION: The graph of a function y+f(x) is vertically expanded by a factor of 2. Find the equation of this expanded function in terms of function f(x)

Question 1074921: The graph of a function y+f(x) is vertically expanded by a factor of 2.
Find the equation of this expanded function in terms of function f(x)
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
The expanded function is .
for every x, ,
so the points with are twice as high above the x-axis,
and the points with are twice as low below the x-axis.
The graph has been stretched vertically to twice as long
(while still firmly nailed at the points on the x-axis, if any).
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