Introduction to Functions: Videos & Practice Problems

$30~\text{ft/min}$, The hiker climbs at an average rate of $30~\text{ft/min}$ during the last $20~\text{minutes}$ of the hike.

$6~\text{ft/min}$, The hiker climbs at an average rate of $6~\text{ft/min}$ during the first $20~\text{minutes}$ of the hike.

$30~\text{ft/min}$, The hiker climbs at an average rate of $30~\text{ft/min}$ during the first $20~\text{minutes}$ of the hike.

$20~\text{ft/min}$, The hiker climbs at an average rate of $20~\text{ft/min}$ during the first $20~\text{minutes}$ of the hike.