Question

Fill in the blanks as necessary.

(a) Kaitlin is deciding how many people to take to the movies. The table below
shows the cost for different sized groups of people.
Number in group
2
3
7
Cost (in dollars)
10
15
28
The cost for each person is not always the same.
The cost for each person appears to be the same.
Predicted number in group for a cost of $40:

Answer 1

• The cost for each person is not always the same.

• 10 people

Explanation:

Number : 2 Cost : $10

• Per person = 10/2 = $5

Number : 3 Cost : $15

• Per person = 15/3 = $5

Number : 7 Cost : $28

• Per person = 28/7 = $4

⇒ The cost is not always the same per person.

⇒ Predicted number in a group for cost of $40 :

⇒ Since 7 costs $28 and if we use 8, it will be $5 per head but the price difference will be too large

⇒ 10 people is more reasonable at a rate of $4 per person