PLEASE HELP IF YOU ARE GOOD AT MATH!!!

The cost of manufacturing x refrigerators is given by the function f(x) = 2x2 + 6000. If the cost doubles for the year 2011 owing to higher raw material prices, which transformation will result in the graph of f(x)?

A) reflection
B) vertical stretch
C) vertical shrink
D) horizontal shrink
E) horizontal stretch

Respuesta :

If we double the costs, then we are going to stretch the graph vertically (B).  Here is why.  If the cost was $6 in 2010 then it doubles in 2011 the new cost would be $12 for the same amount of refrigerators in 2010.  Thus the stretch vertically