The domain is all x-values of coordinate pairs. But, if you need a reasonable domain for a graph, it should be all integers (whole numbers) greater than or equal to zero. This is because you can’t have 1/2 of a person or 1/2 of an engine. You also can’t have any negative engines either. Therefore, the domain would need to be whole numbers greater than (or equal to 0).
To find the total price, we use this equation: 42 + 0.039(42) We can make it simpler: 1.039(42) Multiply: 43.638 Because we're rounding The total price is $43.64
