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Gala2k [10]
2 years ago
9

The function f(x)=2.14/55x + 0.31 can be used to determine the cost, in dollars, of a gallon of gas x years since 1960.

Mathematics
1 answer:
pishuonlain [190]2 years ago
6 0

Answer:

The answer is below

Step-by-step explanation:

The equation for a linear function is given as:

y = mx + b

where m is the slope of the function (that is the rate of change), b is the initial value of y when x is 0.

Given that the function where x represent the number of years since 1960 and y is the cost in dollar as:

f(x)=\frac{2.14}{55}x+0.31

a) In the year 1960, that is x = 0, the cost of a gallon of gas is given as:

f(0)=\frac{2.14}{55}(0)+0.31\\\\f(0)=\$0.31

b) From the function f(x)=\frac{2.14}{55}x+0.31, we can see that the rate of change is 2.14/55. Therefore, the cost increase each year by 4 cents per year.

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