Question

the graph below shows the amounts of rainfall for six months.
(a) what was the greatest amount of rainfall in a month?
mm
(b) when did the greatest increase in rainfall occur?
february to march
march to april
april to may
may to june
june to july

Explanation:

Step1: Find the greatest rainfall amount

By observing the graph, the highest point on the line graph (which represents rainfall amount) is in May. The value at May is 65 mm.

Step2: Calculate the increase in rainfall for each period

• February to March: \(50 - 35=15\) mm
• March to April: \(40 - 35 = 5\) mm
• April to May: \(65 - 40=25\) mm
• May to June: \(60 - 65=- 5\) mm (a decrease)
• June to July: \(43 - 60=-17\) mm (a decrease)

The greatest increase is from April to May.

Answer:

(a) 65
(b) April to May