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Two-variable data and models

Question 1 of 3

Know the idea

The output is directly proportional to the input. What output corresponds to an input of

8

Input	Output
$3$	$9$
$5$	$15$

Worked example

Divide output by input to obtain the constant of proportionality, then multiply by the requested input. Calculation:

9 \div 3 \times 8 = 24

. Result:

24

Video walkthrough

Use the existing worked examples and practice while this walkthrough is being prepared.

The output is directly proportional to the input. What output corresponds to an input of

12

Input	Output
$3$	$15$
$5$	$25$