Which relationship(s) is/are *perfectly* linear?

Question

quantity total fixed expenses

3 4200

0 4200

5 4200

1 4200

shoes belts

0 20

5 5

6 1

1 15

Answer 1

I woudl say the quantity total fixed expenses is perfectly linear.

Just graph the points and connect the dots.

Answer 2

put them in order, it makes it easier

quantity total fixed expenses

0 4200

1 4200

3 4200

5 4200

This is linear

shoes belts

0 20

1 15

5 5

6 1

this is not linear

0-1 changes by 5

5-6 changes by 4

slope changes, it's not linear.

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