Here we have a bar chart and a line graph superimposed on each other. In each one • the bar chart refers to the rainfall and uses the right-hand vertical scale • the line graph refers to the temperature and uses the left-hand vertical scale.

You could have two line graphs instead, but using two different types makes things clearer.
Q1. What obvious feature do you notice right away about the Ibiza temperature and rainfall?
Q2. Does the same thing happen at Kano?
Q3. What obvious contrast is there between Ibiza’s rainfall and Kano’s?
Q4. Roughly what is Kano’s total rainfall for a year?