At time x = 0, water begins to drip steadily out of a water tank. After 1 hour, there are 5.6 gallons of water in the tank. After 7 hours, 3.2 gallons remain. Write a linear function rule that models the number of gallons of water y left in the tank for any number of hours x.

f(x) = -.4x + 6

explanation:

Simply find the slope using the formula

The b value can be found by substituting a point and then isolating b, the point i used was (1, 5.6) because that was the closest point to the start of the graph

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6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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