A pool has some initial amount of water in it. Then it starts being filled so the water level rises at a rate of 6 cm per minute. After 20min the water level is 220 cm

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I think the question below is the one you wanted to ask:

A pool has some initial amount of water in it. Then it starts being filled so the water level rises at a rate of 6 centimeters per minute. After 20 minutes, the water level is 220 centimeters

Graph the pool's water level (in centimeters) as a function of time (in minutes).

Here is my

To draw the linear line, we need to identify the equation that modles this situation. As we know the water level rises at a rate of 6 cm per minute which mean the slope m = 6

The standard form is: y = mx + b <=> y = 6x + b

After 20min the water level is 220 cm

<=> 220 = 6(20) +b

<=> b = 100  

So your  equation is : y = 6x + 100 and the initial amount of water in it is 100

Please have a look at the attached photo

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