Answer
1.7 points/minute
0.6 minutes/point
Work Step by Step
$\frac{81points}{48 minutes}$ = $\frac{81\div48 points}{48\div48 minutes}$ = $\frac{1.7 points}{1 minute}$ = 1.7 points/minute
$\frac{48minutes}{81 points}$ = $\frac{48\div81minutes}{81\div81 points}$ = $\frac{0.6minutes}{1 point}$ = 0.6 minutes/point