W(t)=80+5.4t How much weight does the wrestler gain every 2 months

Question

a young sumo wrestler decided to go on a special diet to gain weight rapidly. W(t) models the wrestlers weight(in kilograms) as a function of time t (in months). W(t)=80+5.4t How much weight does the wrestler gain every 2 months

Answer 1

Just substitute the number of months you want into the equation.

 

t=0:  W(0) = 80 + 5.4(0) = 80 kg

t=2:  W(0) = 80 + 5.4(2) = 90.8 kg

t=4:  W(4) = 80 + 5.4(4) = 101.6 kg

 

So how much weight did he gain every two months?