If y is an explanatory variable and z is the corresponding response variable which of these would be represented by the horizontal axis on a scatterplot?

The correct answer for this question is this one: "B. y" If y is an explanatory variable and z is the corresponding response variable, then y is represented by the horizontal axis and z is represented by the vertical axis.

Here are the following choices:

A. z

B. y

C. Both y and z

D. Neither y nor z

The answer is z, as of summer 2018