Question

the cost of mailing a first - class letter is $0.46 for the first ounce and $0.20 for each additional ounce or portion of an ounce. the letter y represents the total cost for mailing a letter that weighs x ounces. which type of function model would be appropriate for this situation?
absolute value function
square root function
step function
linear function

Explanation:

This scenario involves a cost structure where the price increases in fixed increments for each additional ounce or portion of an ounce, rather than changing continuously with weight. This matches the definition of a step function, which has constant values over intervals and jumps to new constant values at specific points.

Answer:

step function