Higher November 2021 Paper 3 Q23
23 The equation of a curve is \(\qquad y = 16^x\)
(a) Circle the point that lies on the curve. [1 mark]
- (2, 32)
- (32, 2)
- (2, 256)
- (256, 2)
(b) A different point on the curve has \(y\)-coordinate \(\dfrac{1}{16}\)
Work out the \(x\)-coordinate. [1 mark]
| Answer | Mark | Comments |
|---|---|---|
| (2, 256) | B1 |
| Answer | Mark | Comments |
|---|---|---|
| \(-1\) | B1 | accept \((-1,\) \(\dfrac{1}{16}\)\()\) |
Additional guidance
| \(16^{-1} =\) \(\dfrac{1}{16}\) | B0 |