The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May her driving cost was $380 for 480 mi and in June her cost was $450 for 830 mi. Assume that there is a linear relationship between the monthly cost C of driving a car and the distance x driven. Find a linear equation that relates C and d.

Step-by-step explanation:

Let  x be the distance driven, d-distance and C our constant.

Our information can be presented as:

#Subtracting equation 2 from 1:

Hence the fixed cost per mile driven, is $0.20

To find the constant, we substitute in any of the equations:

Now, substituting our values in the linear equation:

      #y=cost of driving, x=distance driven

Hence the linear equation for the cost of driving is y+0.2x+284

the best buy, is the 4- kilogram bag of lollipops for $18.40.

step-by-step explanation:

i found my answer by dividing the cost of each bag by their respective weights.

14.88 divided by 2 = 7.44

17.29 divided by 3 = 5.77

18.4 divided by 4 = 4.6

24.4 divided by 5 = 4.88

by this, i found that the 4 kilo bag is the best buy.