A student plotted the data from a sleep study. The student used the equation of the line y=-0.09x+9.24 to model the data. What does the rate of change represent in terms of these data?
(1) The average number of hours of sleep per day increases 0.09 hour per year of age.
(2) The average number of hours of sleep per day decreases 0.09 hour per year of age.
(3) The average number of hours of sleep per day increase 9.24 hours per year of age.
(4) The average number of hours of sleep per day decreases 9.24 hours per year of age.

Question

A student plotted the data from a sleep study. The student used the equation of the line y=-0.09x+9.24 to model the data. What does the rate of change represent in terms of these data?
(1) The average number of hours of sleep per day increases 0.09 hour per year of age.
(2) The average number of hours of sleep per day decreases 0.09 hour per year of age.
(3) The average number of hours of sleep per day increase 9.24 hours per year of age.
(4) The average number of hours of sleep per day decreases 9.24 hours per year of age.

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