Question

P is directly proportional to u.

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

$\frac{p}{u} =k$

Step-by-step explanation:

• A direct proportion means the ratio of p:u is a constant number
• This constant number is denoted by k
• an example of this is, say for every 1 chicken you buy there are 2 legs which is ratio 1:2 which is $\frac{1}{2}$
• so if you add more chickens, you add more legs, 2 chickens means 4 legs, 8 chickens means 16 legs, which is $\frac{1}{2}= \frac{2}{4} =\frac{8}{16} =0.5$ so the constant number is 0.5, so this a direct proportion
• The two values grow at the same rate