SecondaryMathsDirect proportion10–15 min
Recipe Scaler: Direct Proportion
Use y = kx to scale quantities and read the constant k as the gradient of a line through the origin.
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Theory and model assumptions
Use y = kx to scale quantities and read the constant k as the gradient of a line through the origin.
Teacher guidance
MOE O-Level Mathematics 4052: Ratio & proportion, direct proportion
Expected time: 10–15 minutes.