Question

what is the proper term for the red line? y - axis x - axis up and down left and right

Explanation:

Step1: Recall coordinate - axis definitions

In a Cartesian coordinate system, the vertical axis is the \(y -\)axis and the horizontal axis is the \(x -\)axis.

Step2: Identify the red line

The red line in the given graph is vertical.

Answer:

y - axis