Class 7 maths · B.11 · Proportional relationships
Use y = kx with decimal k
Replace x with the number and multiply.
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y = 4x. Find y when x = 4.
Answer: 16
y = 2.2x. Find y when x = 5.
Answer: 11
y = 2.7x. Find y when x = 3.
Answer: 8.1
Tip: Replace x with the number and multiply.
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