Solve the problem.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 30 mph results in a rating of 29 mpg, where as at an average speed of 35 mph, her car rates 19 mpg. Find a linear function 
whose input is the speed in miles per hour and whose output is the gas mileage in miles per gallon.
A. f(x) = 
x + 89
B. f(x) = 
x + 31
C. f(x) = - 2x + 31
D. f(x) = - 2x + 89
Answer: D
Mathematics
You might also like to view...
Simplify.(2
+ 6
)(3
+ 9
)
A. 6
+ 54
B. 288 + 36
C. -252 + 36
D. 6
+ 54
+ 36
Mathematics
Find the slope of the line through the pair of points.(-1, 0) and (0, -3)
A. - 
B. 
C. 3
D. - 3
Mathematics
Find the whole.20% of what number of highways is 93 highways?
A. 19 highways B. 4650 highways C. 47 highways D. 465 highways
Mathematics
Evaluate using a number line.-1 + 4 
A. 5 B. -5 C. 3 D. -3
Mathematics