Which of the following functions have a domain of (-8, 8) and a range of (-2, 8)?

Question

Which of the following functions have a domain of (-∞, ∞) and a range of (-2, ∞)? Check all that apply.
A. F(x)=3^x+2
B. F(x)=3^x-2
C. F(x)=0.25^x+2
D. F(x)=0.25^x-2

Answer 1

All the exponential functions shown have the same domain, (-∞, ∞). B and D are both shifted vertically down 2 units and therefore have a range of (-2, ∞).