Answer:
Option A
Step-by-step explanation:
Slope of a line passing through two points [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] is given by,
Slope = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Line shown in the graph is passing through two points (2, 8000) and (4, 7000).
Therefore, slope of the given line = [tex]\frac{8000-7000}{2-4}[/tex]
= -500 feet per mile
Which means, altitude decreases by 500 ft every mile.
(Negative sign represents the decrease)
Option A is the correct option.
