Question

Rip van Winkle fell asleep for a very long time. The length of his beard ( In millimeters ) and a function of time ( in weeks ) is graphed.How fast did Rip van Winkle's beard grow?

Answer 1

Answer:

2.5mm per week.

Explanation:

To determine how fast Rip van Winkle's beard grew, we calculate the slope of the line.

To do this, pick two points on the line: (0,10) and (10,35)

$\begin{gathered} \text{Slope},m=\frac{Change\text{ in y-axis}}{Change\text{ in x-axis}} \\ =\frac{35-10}{10-0} \\ =\frac{25}{10} \\ =2.5\text{ mm per week} \end{gathered}$

Rip van Winkle beards grew at a rate of 2.5mm per week.