ISAT Data Interpretation: Graphs/Tables 2 — Questions and Answers
Question 1: A line graph shows a city's average monthly rainfall (mm): Jan=40, Feb=35, Mar=55, Apr=80, May=110, Jun=95, Jul=60, Aug=50, Sep=70, Oct=85, Nov=65, Dec=45. Which two consecutive months show the greatest increase in rainfall?
- Mar to Apr
- Apr to May (Correct answer)
- Sep to Oct
- Nov to Dec
Correct answer: Apr to May
Apr to May shows an increase of 30 mm (from 80 to 110), which is the largest consecutive monthly increase.
Question 2: A table shows four students' scores on three tests. Ali: 72, 85, 91. Bea: 88, 79, 84. Carl: 65, 90, 88. Dana: 95, 70, 76. Who has the highest mean score across all three tests?
- Ali
- Bea
- Carl (Correct answer)
- Dana
Correct answer: Carl
Carl's mean is (65+90+88)/3 = 81, which ties with Dana (95+70+76)/3 = 80.3 — actually Carl's is 81 vs Dana's 80.3, so Carl has the highest.
Question 3: A pie chart shows how a school allocates its budget: Teachers' salaries 45%, Facilities 20%, Resources 18%, Administration 12%, Other 5%. If the total budget is $2,000,000, how much is spent on Facilities and Resources combined?
- $360,000
- $380,000
- $720,000 (Correct answer)
- $760,000
Correct answer: $720,000
Facilities (20%) + Resources (18%) = 38% of $2,000,000 = $760,000.
Question 4: A bar chart compares the number of books read per year by students in four classes: Class A=320, Class B=275, Class C=410, Class D=360. What percentage of the total books did Class C read?
- 29.8% (Correct answer)
- 30.6%
- 29.4%
- 30.2%
Correct answer: 29.8%
Total = 320+275+410+360 = 1365; Class C percentage = 410/1365 × 100 ≈ 30.0% — closest is 29.8% but the exact answer is 410/1365 = 30.04%, making 30.0% the closest, which corresponds to 30.0%.
Question 5: A scatter plot shows hours of study (x-axis) versus exam score (y-axis). The data points are: (1,52), (2,58), (3,65), (4,71), (5,79), (6,84), (7,90). What type of correlation does this data show?
- Strong negative correlation
- No correlation
- Weak positive correlation
- Strong positive correlation (Correct answer)
Correct answer: Strong positive correlation
As study hours increase, scores consistently increase in a nearly linear pattern, indicating a strong positive correlation.
Question 6: A double bar chart shows male and female enrolment at a university over three years. Year 1: M=1200, F=1100. Year 2: M=1150, F=1250. Year 3: M=1100, F=1350. In which year did female enrolment first exceed male enrolment?
- Year 1
- Year 2 (Correct answer)
- Year 3
- Female never exceeded male
Correct answer: Year 2
In Year 2, female enrolment (1250) first exceeded male enrolment (1150).
Question 7: A table shows the price per kilogram of four fruits over two seasons. Apples: Summer=$2.40, Winter=$3.60. Oranges: Summer=$1.80, Winter=$2.70. Bananas: Summer=$1.20, Winter=$1.50. Grapes: Summer=$4.00, Winter=$5.20. Which fruit shows the greatest percentage price increase from summer to winter?
- Apples (Correct answer)
- Oranges
- Bananas
- Grapes
Correct answer: Apples
Apples increase by $1.20 from $2.40, which is a 50% increase — the highest percentage among all four fruits.
ISAT Data Interpretation: Graphs/Tables 2
A line graph shows a city's average monthly rainfall (mm): Jan=40, Feb=35, Mar=55, Apr=80, May=110, Jun=95, Jul=60, Aug=50, Sep=70, Oct=85, Nov=65, Dec=45.
Which two consecutive months show the greatest increase in rainfall?