Question

P is directly proportional to u.

Answer 1

`(p)/(u) =k`

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
  `(1)/(2)`
• so if you add more chickens, you add more legs, 2 chickens means 4 legs, 8 chickens means 16 legs, which is
  `(1)/(2)= (2)/(4) =(8)/(16) =0.5` so the constant number is 0.5, so this a direct proportion
• The two values grow at the same rate

Answer 2

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Explanation:

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