Working with your partner, use the graph of the function on the below to estimate the values of A for different values of t. Record your answers in the table below. yA 10 15 100 80 y = A(t) 60 40 20 4 8 12 16 20 t Time (hours) Amount of caffeine (mg) 20

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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: