0.6=k
This is your answer because the equation is for direct variation is y=kx
You substitute the numbers
Here is your word problem →
A boy had $1.02 with him , his friend Chucky gave him some amount of money and now he has $13.48 . How much money did Chucky gave to that boy.
Solution →
Let the money given by Chucky be c.
Therefore , According to question →
c + 1.02 = 13.48
or, c = 13.48 - 1.02
or, c = 12.46
Answer → Chucky gave him $12.46
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Given that the time taken to get to campus is inversely proportional to driving rate, let the time be t and rate be r, thus the function will be written as:'
t=k/r
where
k is the constant of proportionality given by:
k=tr
when r=20 mph, t=1.25 hrs
thus
k=20×1.25
k=25 miles
thus the formula is:
t=25/r
when r=55 mph, the value of t will be:
t=25/55
t=5/11 hours
