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Back to 8.9 Use Direct and Inverse Variation

8.9 Exercise 23

Avg difficulty 2.5

The number of hours it takes for ice to melt varies inversely with the air temperature. Suppose a block of ice melts in 2 hours when the temperature is 65 degrees.

  1. ⓐ Write the equation of variation.
  2. ⓑ How many hours would it take for the same block of ice to melt if the temperature was 78 degrees?

OpenStax Elementary Algebra 2e, 8.9 Use Direct and Inverse Variation, exercise 23

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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.