Which function has an inverse that is a function? b(x) = x2 + 3
d(x) = -9
m(x) = -7x
p(x) = \x1

In order for a function to have an inverse, it must pass the horizontal line test!! Horizontal line test If the graph of a function y = f(x) is such that no horizontal line intersects the graph in more than one point, then f has an inverse function.

Step-by-step explanation:

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