Higher June 2025 Paper 2 Q17
17 Here is a sketch of part of the graph of \(y = k^x\) where \(k\) is a positive constant.
The graph passes through the point with coordinates \((-1, 1.5)\)
Find the value of \(k\). (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(\dfrac{2}{3}\) | M1 | for correct substitution, eg \(1.5 = k^{-1}\) oe or \(\dfrac{1}{1.5}\) |
| A1 | oe but not \(\dfrac{1}{1.5}\) |
Additional guidance
Accept rounded or truncated to 2dp or better