Higher June 2023 Paper 1 Q13
13 \(y\) is directly proportional to \(x\).
\(y = 24\) when \(x = 1.5\)
Work out the value of \(y\) when \(x = 5\) (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| 80 | M1 | for setting up an equation with a constant term, eg \(y = kx\) oe or \(24 = k \times 1.5\) oe or \(k = 16\) or for starting to work with direct proportion, eg \(24 \div 1.5\ (= 16)\) or \(5 \div 1.5\ (= 3.33\ldots)\) |
| M1 | for substituting in \(y = kx\), eg \(y = \text{``}16\text{''} \times 5\) or for a complete method, eg \(24 \div 1.5 \times 5\) or \(5 \div 1.5 \times 24\) | |
| A1 | cao |
Additional guidance
Condone the use of “\(\propto\)” instead of “=” for the M marks