Answer: 72 minutes
Step-by-step explanation:
Ww would use direct proportion with the formula: y = kx
where y = number of minutes
x = distance
18 = 4k
k = 18/4
k = 4.5
Therefore, the number of minutes that it would take her to run 16 km would be:
y = kx
y = 4.5 × 16
y = 72 minute
