Answer:
It is not direct variation
Step-by-step explanation:
y/7 = 2/x
y = 7×2/x
y = 14/x
And
y = k/x
k = 14 which is the constant of proportionality
: y ∞ 1/x
This is inverse variation
279.93 ≈ 280 seconds or 4 minutes 40 seconds
We need to find an equation in the form

.
To find

, we use the formula:

We'll use the points

and

:

The value of

(the y-intercept) is the value of

when

, which is 25.
So the equation is

(choice A).