Answer:
A. -1/5
B. 8 gallons
C. 75 miles driven
Step-by-step explanation:
Part A is essentially just asking for the slope, which is written as a fraction with the numerator being the number of units the line goes up/down and the denominator being the number of units the line goes left/right. Because the line is going down from left to right, the slope is negative. The slope is -1/5.
Part B can be answered by simply looking at the graph and seeing where the line is at above 175 miles, which is 8 gallons.
Part C can be answered in the same way as Part B, by looking at where the line is at when level with 12 gallons, which is 75 miles driven.
Answer: $0.42
Step-by-step explanation:
The rate at which the average cost of 1 gallon of gasoline is increasing is exponential. We would apply the formula for exponential growth which is expressed as
y = b(1 + r)^ t
Where
y represents the cost after t years.
t represents the number of years.
b represents the initial cost.
r represents rate of growth.
From the information given,
b = $0.31
r = 3% = 3/100 = 0.03
t = 1972 - 1962 = 10 years
Therefore,
y = 0.31(1 + 0.03)^10
y = 0.31(1.03)^10
y = $0.42
12.6 is the answer. Hope this helps :)