What is the vertical intercept of your graph

This question is incomplete

Explanation:

Without the diagram illustrating the scores for the subjects, it is not possible to give exact values, however the process of finding each answer can be explained.

The options are related to errors made in steps 1 and 3. For step 1:

Finding the median is simply reading off the graph/diagram. If you wish to calculate the value on your own, you take the "middle value". For example, if the scores are 60, 70 and 80, the median value would be the one in the middle (70).

For step 3:

Calculating the interquartile range is done by taking the value for the 3rd quartile, and subtracting the value for the 1st quartile. The difference between the values is known as the interquartile range.