A car is traveling on a highway. The distance (in miles) from its destination and the time (in hours) is given by the equation d=420-65t. What is the slope of the line represented by the equation? What is the practical meaning of the slope?

a.
m=420; The total distance is 420 miles.
b.
m=65; The car is traveling 65 miles per hour.
c.
m=-65; The car is traveling 65 miles per hour.
d.
m=-420; The total distance is 355 miles.

Question

A car is traveling on a highway. The distance (in miles) from its destination and the time (in hours) is given by the equation d=420-65t. What is the slope of the line represented by the equation? What is the practical meaning of the slope?

a.
m=420; The total distance is 420 miles.
b.
m=65; The car is traveling 65 miles per hour.
c.
m=-65; The car is traveling 65 miles per hour.
d.
m=-420; The total distance is 355 miles.

dude · Answer

Slope (or rate) is the coefficient next to the variable [in this case t]