A company's cost function is given as C(x) = 20,000 + 4.50x, where x is the number of units produced. What is the slope of this function, and what does it represent?

The slope is 4.50. It means the company is losing $4.50 per unit.

The slope is 4.50. It means that each unit sells for $4.50.

The slope is 4.50. It means that for every unit produced, the cost is $4.50 per unit.

The slope is 20,000. It means the cost per unit is $20,000.