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ABHYAS PREP: DATA INTERPRETATION · DATA INTERPRETATION

Line graph: averages and the steepest rise

For an average, add the points and divide by how many there are. For the “greatest increase”, compare the jumps between consecutive points (absolute) or their ratios (percentage), as the question asks.

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Worked examples

Example 1 · level 1

The line graph shows the monthly sales of a pune cycle store. What were the average monthly sales from January to June?

  1. 127.5
  2. 138.33
  3. 150
  4. 166
Show solution
  1. Total = 125 + 150 + 195 + 125 + 105 + 130 = 830.
  2. Average = 830 ÷ 6 = 138.33.

Answer: 138.33

Example 2 · level 2

The line graph shows the monthly sales of a pune cycle store. What were the average monthly sales from January to June?

  1. 125
  2. 143.33
  3. 150
  4. 172
Show solution
  1. Total = 165 + 60 + 170 + 190 + 140 + 135 = 860.
  2. Average = 860 ÷ 6 = 143.33.

Answer: 143.33

Example 3 · level 3

The line graph shows the monthly sales of a jaipur bookshop. What were the average monthly sales from January to June?

  1. 137.5
  2. 145
  3. 150
  4. 174
Show solution
  1. Total = 155 + 125 + 105 + 170 + 195 + 120 = 870.
  2. Average = 870 ÷ 6 = 145.

Answer: 145

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