It is important to note that when we say proportional, the increase in the value of the independent variable (in this case, distance x) will also increase the value of the dependent variable (density, d). Using k as the proportionality constant, the answer to this question would then be,
d = kx
Providing 1 mile is 5280 feet, then,

It will travel,

in 15 seconds.
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Answer:
x=1
Step-by-step explanation:
Answer:
y = 1
Step-by-step explanation:
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