A watering can dispenses water at the rate of 0.20 gallon per minute. The original volume of water in the can was 8 gallons. Which set of ordered pairs shows the volume of water in the can in gallons (y), as a function of time in minutes (x), from the first minute after can starts dispensing water?

{(7.8, 1), (7.6, 2), (7.4, 3)}
{(1, 7.8), (2, 7.6), (3, 7.4)}
{(8.0, 1), (7.8, 2), (7.6, 3)}
{(1, 8.0), (2, 7.8), (3, 7.6)}

Question

A watering can dispenses water at the rate of 0.20 gallon per minute. The original volume of water in the can was 8 gallons. Which set of ordered pairs shows the volume of water in the can in gallons (y), as a function of time in minutes (x), from the first minute after can starts dispensing water?

 {(7.8, 1), (7.6, 2), (7.4, 3)}
 {(1, 7.8), (2, 7.6), (3, 7.4)}
 {(8.0, 1), (7.8, 2), (7.6, 3)}
 {(1, 8.0), (2, 7.8), (3, 7.6)}

blackops2luvr · Answer

@iGreen

freckles · Answer

at x=0 we are given y=8
so at x=n we have that y=8-.2n

freckles · Answer

this is easy to see by following your tank dispensing water at.2 gallon per minute 
beginning with 8 gallons 
at x=0 we have y=8
at x=1 we have y=8-.2
at x=2 we have y=8-.2-.2 or y=8-2(.2)

freckles · Answer

i hope that helps

blackops2luvr · Answer

not exactly

freckles · Answer

hmmm...
well i actually gave you the answer

freckles · Answer

I don't know what else to say

freckles · Answer

except is it the arithmetic you are having a problem with?

freckles · Answer

if you have 8 and you take away .2 what do you have?

freckles · Answer

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