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

C

Step-by-step explanation:

If a function passes both the vertical line test (so that it is a function) and the horizontal line test (so that its inverse is a function), then the function is one-to-onefunction and has an inverse function.

A.

The graph of this function is a parabola. Each vertical line crosses it at exactly one point, but horizontal lines can cross it at two points.

B.

This is not a function, because h=the vertical line y=-9 crosses it at infinitely many points.

C.

Both vertical and horizontal lines cross the graph of this function at exactly one point. So, this function has an inverse

D.

Each vertical line crosses it at exactly one point, but horizontal lines can cross it at two points.

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.