How could you plot more than one responding variable on a line graph

  use more than one line

Step-by-step explanation:

A line graph is not limited to a single line.

You can plot as many responding variables as you like. One way to do it is to use a separate line for each variable.

Another way to do it is to identify some relationship between the variables that may be of interest (their difference or ratio or some other function of the responding variables) and plot that.

To start this is a ratio, and the goal is to get at least 1 to be a whole number so first lets get the number below 1 to 1.

0.75 : 2 5/16 ---> (x1.3333 on both sides) ---> 1 : 3 1/12.

Next, if needed for your answer, lets get the other number to be a whole number as well. We can do this my multiplying both sides by 12 since the fraction on 3 1/12 is 1/12.

1 : 3 1/12 --> (x12 on both sides) ---> 12 : 37

Your final answer will either be 1 : 3 1/12 or 12 : 37, depending on the formatting expected for your homework assignment.