Me, i'm failing
a car's speedometer has a percent error of 5%. the speedometer currently shows that the car is traveling at a speed of 60 mph. which statement describes what the actual speed of the car could be?
a. the actual speed of the car is either 30 mph or 90 mph.
b. the actual speed of the car is either 55 mph or 65 mph.
c. the actual speed of the car is either 57 mph or 63 mph.
d. the actual speed of the car is either 58 mph or 62 mph.

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: