Question

Martin modeled the distance, y, that runners traveled during a race a function of the time, that they ran. Which would best describe the domain of this function?

Answer 1

All positive real numbers

Explanation:

Given

The model can be represented as:

`y = f(x)`

`y = distance`

`x = time`

Required

Determine the domain

This means that we list out possible values of x.

If x represents time, then it is impossible for x to be negative.

This implies that x can take any value as long as it is greater than or equal to 0.

Hence, the domain is all positive real numbers