Question

which of the following functions has a range of all real numbers? a. y=-3x^2+5 b. y=4x^2-1 c. y=6(2^x) d. y=-7x+2

Answer 1

Think about it this way, in order for the function to have a range of all real numbers, that means you need to be able to get both positive numbers and negative numbers, and not be restricted, you need to be able to get to negative infinity and positive infinity, a few of those should immediately be obvious that they can't be negative or positive

Answer 2

Choice D y=-7x+2