To find the constant rate, we use the following formula.
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
For a, we choose two points from the table: (5, 95) and (10, 90).
Now, let's replace the points in the formula.
[tex]m=\frac{90-95}{10-5}=\frac{-5}{5}=-1[/tex]
Therefore, the constant rate is -1.
For b, we choose the points (8, 80) and (16, 60).
Let's do the same process.
[tex]m=\frac{60-80}{16-8}=\frac{-20}{8}=-\frac{5}{2}[/tex]
Therefore, the constant rate is -5/2.
