Higher Plus
3rd February 1973
- 1Histograms3 marks
A histogram has two bars: one 20 units wide with frequency density 2.5, one 10 units wide with density 0.8. How many values in total?
- 2Bounds3 marks
A car covers 160 m (to the nearest 10 m) in 9 s (to the nearest second). Work out the lower bound of its speed, to 2 decimal places.
- 3Rearranging Harder Formulae3 marks
Make x the subject of 8x + 4 = y(x + 4).
- 4Velocity Time Graphs2 marks
On a velocity-time graph a car speeds up in a straight line from 8 m/s to 13 m/s over 10 seconds. Work out the acceleration.
- 5Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = a - 4b and vector RS = 2a - 8b. What does this show about PQ and RS?
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