The functions f(x) and g(x) are shown on the graph. f(x)=x² what is g(x)?
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  b.  g(x) = 2x²

Step-by-step explanation:

The vertices of the two curves are in the same place, so no translation has taken place. This eliminates choices 'a' and 'd'.

A point on the curve g(x) is given. You can test to see which of choices 'b' and 'c' it satisfies.

  B: g(2) = 2(2²) = 8 . . . . matches point (2, 8)

  C: g(2) = (1/2·2)² = 1² = 1 . . . . does not match point (2, 8)

The function g(x) is ...

  g(x) = 2x²

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.