Description
The distance d, in miles, that a car travels on a 3-hour trip is proportional to its speed s (which we assume remains the same throughout the trip), in miles per hour.
(a) What is the constant of proportionality in this case?
(b) Write a formula that expresses d as a function of s.
d =
(b) Write a formula that expresses d as a function of s.
d =
s·3
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Explanation & Answer
Hello!
(b) the formula is correct, d = s*3 (miles).
(a) s is not a constant -- it is a value that can change. 3 is a constant.
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