Question 35506
You don't have to draw a graph, although if you have one in front of you in the problem, it will help.  Just take the given values of x, substitute these into the three given functions, and see which function gives you the correct y values.

1.  If x = -2, then y = 2,  and   if x = 2, then y = 2.


A) f(x) = 2x^2
-> f(-2) = 2(-2)^2 = 8.  This does NOT work, so it is eliminated.


B) f(x) = 3x^2
-> f(-2) = 3(-2)^2 = 12.  Again, this does NOT work.


C) f(x) = 1/2 x^2
-> f(-2) = 1/2* (-2)^2 = 1/2*4= 2.  This one checks.
-> f(2) = 1/2* (2)^2 = 1/2*4= 2.  This one also checks.


Therefore the answer is C.


Likewise you can do the second problem, right???


R^2 at SCC