Answer:
(d) y = 10x
Explanation:
You want the equation representing the distance traveled (y) as a function of time (x) if the airplane travels 300 miles in 30 minutes.
Proportion
The equation representing the proportion is ...
y = kx
Using the given values of y and x, we can find the value of k.
300 = k·30 . . . . . . y is miles, x is minutes
10 = k . . . . . . . . . . divide by 30
The equation for the distance is ...
y = 10x . . . . . . matches choice D
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