If the price of a gallon in 1940 was $0.18 and $3.10 in 2010,the percentage rate of change for a gallon of gasoline over this period was

About 4.17%

Step-by-step explanation:

Given: The price of a gallon of gasoline in 1940 = $0.18

The price of a gallon of gasoline in 2010 = $3.10

Change in period :

Change in price over the period :  

Now, the percentage rate of change of price for a gallon of gasoline over this period is given by :-

Hence, the  percentage rate of change of price for a gallon of gasoline over this period was 4.17 %.

3 is greater then both of those numbers

a) y = -3x +2

b) y = 1/2x -6

these 2 can be combined into one equation.

-3x +2 = .5x -6

8 = 3.5x

x = 8 / 3.5 = 2.2857142857

y = -3 * (8 / 3.5) +2

y = (-24 / 3.5) + 2

y = -4.8571428571

step-by-step explanation: