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Back to 8.9 Use Direct and Inverse Variation

8.9 Exercise 8

Avg difficulty 2.5

The number of calories, c, burned varies directly with the amount of time, t, spent exercising. Arnold burned 312 calories in 65 minutes exercising.

  1. ⓐ Write the equation that relates c and t.
  2. ⓑ How many calories would he burn if he exercises for 90 minutes?

OpenStax Elementary Algebra 2e, 8.9 Use Direct and Inverse Variation, exercise 8

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Adapted from Elementary Algebra 2e © 2020 Rice University. Licensed under CC BY 4.0. Source: Elementary Algebra 2e. Imported at revision 77a933c.