Mai is filling her fish tank. Water flows into the tank at a constant rate. Complete the table and answer the question below. time (minutes) water (gallons)
0.5 0.8
1
3
40

What is the constant of proportionality?

Step-by-step explanation:

Given

x   -----   y

0.5. --- 0.8

1. --- 1.6

3.--- 4.8

25. --- 40

Required

Determine the constant of proportionality

This can be calculated using the following formula:

; Where r is the constant of proportionality;

Solve for r

When x = 0.5; y = 0.8

When x =  1; y =1.6

When x =  3; y = 4.8

When x =  25; y = 40

Notice that the value of r is constant throughout;

Hence:

step-by-step explanation:

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1