Fast food sales have increased approximately linearly from 9

Fast food sales have increased approximately linearly from $92.5 billion in 2002 to $105.5 billion in 2005. Let n be the amount of sales (in billions) t years since 2000. Find an equation of a linear model to describe the data. to receive full credit. Given: f(x)= 3x - 4, find the value of x when f(x) = -46.

Solution

Given that

f(x) = 3x - 4 and f(x) = -46

Hence ,

3x - 4 = -46

3x = -46 + 4

3x = -42

x = -42/3

x = -14

Therefore ,

x = -14