You need a total of 50 pounds of two types of ground beef costing $1.25 and $1.60 per pound, respectively. a model for the total cost y of the two types of beef is y = 1.25x + 1.60(50 − x) where x is the number of pounds of the less expensive ground beef. a) find the inverse function of the cost function. what does each variable represent in the inverse function? b) use the context of the problem to determine the domain of the inverse function.

a mix with a total cost of x=$73.

Of course, 30 pounds (50 pounds - 20 pounds = 30 pounds) of that mix will be the more expensive ground beef.

answer: domain and range mean all possible values of x and y that could be substituted to the inequality. a solution means all possible values that make the inequality statement true. so while the range is still all real numbers, the solution is the shaded area, for which y will always be greater than the line of the function.

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