According to the family's data-use graph, by what percentage did their monthly use grow from January to March? Line graph titled A family's mobile data use. Data used: January 40 GB; February 45 GB; March 54 GB; April 60 GB; May 48 GB; June 72 GB.

Data Interpretation · Question 49 of 75

According to the family's data-use graph, by what percentage did their monthly use grow from January to March?

Question 49

MediumOriginal question

According to the family's data-use graph, by what percentage did their monthly use grow from January to March?

Line graph titled A family's mobile data use. Data used: January 40 GB; February 45 GB; March 54 GB; April 60 GB; May 48 GB; June 72 GB.

12.5%Correct answerYour answer14%Correct answerYour answer25.9%Correct answerYour answer35%Correct answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

January: 40 GB. March: 54 GB. Growth: 14 GB.
Percentage growth: $\frac{14}{40} \times 100 = 35\%$ .

Worth noting

25.9% divides the growth by March's use instead of January's. 12.5% is the growth only from January to February. 14% mistakes the growth of 14 GB for a percentage.

Concept: Percentage change along a line
Typical timeTypical: 80 s
Your timeYours: —

The rule this testsLine graphs

Practise this chapter →

Ten questions from Data Interpretation, at your own pace.

Practise this chapter →

Ten questions from Data Interpretation, at your own pace.

Practise this chapter All 75 questions in Data Interpretation Revise the notes for Data Interpretation

According to the family's data-use graph, by what percentage did their monthly use grow from January to March?

Question 49

Explanation