The per capita consumption of breakfast cereal in the US has the following model that appears above C(t) = – 0.0034t + 0.106ť² – 0.349t + 11.4 pounds, where t is the number of years since 1990. Decide whether the rate of consumption was changing more rapidly in 2001 or 2009. С (11) - lbs/year С (19) - lbs/year The rate was changing more rapidly in O 20010 2009.

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: