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:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

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