Class 8 Graphs of Real-Life Data — practice questions with answers
Coordinate Geometry · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.
1. On a line graph showing temperature against time, which quantity is usually shown on the horizontal x-axis?
ATime
BTemperature
CBoth axes show temperature
DNeither
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Answer: A) Time
The independent variable (time) is plotted on the x-axis and the dependent variable (temperature) on the y-axis.
2. Reading the graph below, what is the y-value of the plotted point at x = 2?
A40
B44
C80
D36
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Answer: A) 40
The point above x = 2 lines up with y = 40 on the vertical axis.
3. A graph showing how the parts of Riya's monthly budget compare as fractions of her total income is best drawn as a:
APie chart
BLine graph
CDistance-time graph
DNumber line
Show answer
Answer: A) Pie chart
A pie chart shows how a whole is divided into parts, ideal for budget shares.
4. A pictograph of books read in a library uses one symbol = 8 books. Monday shows 3 symbols, Tuesday shows 5 symbols. How many more books were read on Tuesday than on Monday?
5. A line graph of profit (Rs thousands) over 6 months shows: Jan 5, Feb 8, Mar 8, Apr 6, May 11, Jun 14. For how many of the month-to-month changes did the profit actually increase (go up)?