Question

Determine the range of the function? Y=2x(squared) +3

A.all real numbers
B.all integers less than or equal to 3
C.all integers greater than or equal to 3
D.all real numbers less than or equal to 3

Answer 1

The range of y = x^2 is the set of nonnegative numbers. The same applies to y = 2x^2 as well. Shift everything up three units to get y = 2x^2+3

So the range is the set of numbers y such that
`y \ge 3`

The final answer is choice C.