A line graph shows temperatures: Mon 68, Tue 72, Wed 75, Thu 70. What is the average temperature over these four days?

A line graph shows temperatures: Mon 68, Tue 72, Wed 75, Thu 70. What is the average temperature over these four days?

• A. 70.0
• B. 72.5
• C. 75
• D. 71.25

Answer: (D)

To find the average temperature, add all four days’ temperatures and divide by the number of days. The days sum to 68 + 72 + 75 + 70 = 285. There are four days, so 285 ÷ 4 = 71.25. The average temperature over the four days is 71.25 degrees. This result comes from using the exact mean of all data points; choosing a different divisor or rounding would yield a different value, which is why 71.25 is the correct average.

To find the average temperature, add all four days’ temperatures and divide by the number of days. The days sum to 68 + 72 + 75 + 70 = 285. There are four days, so 285 ÷ 4 = 71.25. The average temperature over the four days is 71.25 degrees. This result comes from using the exact mean of all data points; choosing a different divisor or rounding would yield a different value, which is why 71.25 is the correct average.