Which function has an inverse that is a function?

b(x) = x2 + 3
d(x) = –9
m(x) = –7x
p(x) = |x|

Question

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

jhonyy9 · Answer

do you know how you get the inverse of a function ?

djmaster · Answer

I created a solution for you at Calorful
This is a step by step calculator for algebra questions.

mathmale · Answer

You are given four relationships and are asked to determine which of them has an inverse (with "that is a function" added on.

There is a simple test here:  the horizontal line test.  If you sketch the graph of a relationship and then draw a horiz line thru the graph, and that line intersects the graph more than once, then the relationship in question does not have an inverse function.

The parabola y=x^2 does not have an inverse because it fails this horizontal line test.  Please graph y=x^2 and draw a horiz. line thru the graph.  You'll see that this horiz. line intersects the graph in 2 places.  Sorry...this function does not have an inverse.

And so on.