A direct-proportion graph

A direct-proportion graph

Secondary 2
6 marks
TGM Original Questions

For nonnegative quantities, \(y\) is directly proportional to \(x\). Given \(y=6\) when \(x=2\),

  1. find the equation;[2]
  2. form a table and draw the graph for \(0\le x\le4\), using integer values of \(x\);[3]
  3. explain how the graph shows direct proportion.[1]

Solution:

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Answer:(a) \(y=3x\). (b) Table: \(0,3,6,9,12\); see graph. (c) A straight line through the origin.

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