Question

Starbucks sells coffee for $3.50 per cup. A group of 8 people order drinks.

What's the function

What's the domain

What's the range

Answer 1

See below

Explanation:

If we know that each coffe is sold for $3.50, the function can be written using the following form:

`y=3.50 . x`

Where Y=amount of money earned, and X=number of coffes ordered.

The domain are the possible values for X. In this case, the domain can be written as:
`(0; 8)`, as we know that eight people have bought coffe, and the function exists only when the number x is positive (as there can't be a negative number of coffes ordered), from 0 to 8.

The range are the possible numbers for Y. In this case, if 8 coffes are ordered, then the maxium value of Y is:

`y=3.50 . 8`

`y=28`

So the range can be written as:
`(0;28).`