Answers:
- 3.1 The graph is correct
- 3.2 Tuesday and Sunday
- 3.3 Increase of 15 on Tuesday; Increase of 10 on Sunday
- 3.4 Friday and Saturday
- 3.5 Sales neither increase nor decrease
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Step-by-step explanation:
Question 3.2
There's an increase in sales whenever we have the line go uphill, when moving left to right. Tuesday is the first time this happens. Sunday is the other time.
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Question 3.3
From Monday to Tuesday is an increase of 15 since 20-5 = 15
From Saturday to Sunday is an increase of 10 because 15-5 = 10
We subtract the two values to find the increase.
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Question 3.4
A decrease in sales happens when the line goes downhill when reading left to right.
A decrease in sales happens on the following days:
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Question 3.5
The line is horizontal and flat from Tuesday to Thursday.
This represents no change in sales. There are no increases, and there aren't any decreases either.
The number of sales is 20 packets for each these three days.