Which of the following is an exponential function?

a.

y = 3x
b.

y = 2x − 4
c.

y = x3

d.

y = 3+5x

Step-by-step explanation:

A:  y = 3x is a linear function;

B:  y = 2x - 4 is also a linear function;

C:  y = x^3 (not x3) is a power function;

D:  y = 3 + 5x is a linear function

An exponential function looks like y = a(b)^c; none of these possible answers fit!  Ensure that you have copied this problem down completely and correctly.

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.