Let a, b, c, d be fixed numbers, and suppose that a≠0 and a≠1. Which of the following types of common functions are one-to-one

Question

Let a, b, c, d be fixed numbers, and suppose that a≠0 and a≠1.
Which of the following types of common functions are one-to-one for any chosen values of a, b, c, and d?
Select all that apply.
The cubic function y = ax³ + bx² + cx + d
The linear function y = ax + b
The quadratic function ax²+bx+c
The logarithmic function y = loga(x) (suppose a > 0)
The exponential function y = a^x (suppose a > 0)

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