Year 8 maths · B.10 · Proportional relationships
Write and use y = kx with whole number k
Replace x with the number and multiply.
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See worked examples
y = 2x. Find y when x = 6.
Answer: 12
y = 2x. Find y when x = 10.
Answer: 20
y = 11x. Find y when x = 3.
Answer: 33
Tip: Replace x with the number and multiply.
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