Maths-
General
Easy
Question
At time t = 0 , water begins to drip out of a pipe into an empty bucket. After 56 minutes , 8 inches of water are in the bucket What linear function in the form y= mx + b represents the amount of water in inches W, in the bucket after t minute?
Hint:
Use two – point form
The correct answer is: W = 1/7 t
Amount of water in bucket = W inches
Time taken = t min
Acc. to the question, when t = 0 , W = 0
And when t = 56 , W = 8
Using two – point form, equation of the line is
(y – y1) = m (x – x1) where m = 
m = 
= 
Now, equation of the line is (W – W1) = m (t – t1)
(W – 0) = (t – 0)
W = t
m = = Now, equation of the line is (W – W1) = m (t – t1)
(W – 0) =
(t – 0)W =
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