Answer: Option 'd' is correct.
Step-by-step explanation:
Since we have given that
Distance traveled by Jesse's car = d
Number of gallons used = g
The relation between distance and number of gallons used is given by
[tex]d=15g[/tex]
We need to find the constant of proportionality in terms of distance traveled per gallon of gas.
So, Constant of proportionality = [tex]\dfrac{Distance\ traveled}{Gallon\ of\ gas}=\dfrac{d}{g}[/tex]
Since we have
[tex]d=15g\\\\\dfrac{d}{g}=\dfrac{1}{15}=Constant\ of\ proportionality[/tex]
Hence, Option 'd' is correct.