O-LevelAdditional MathematicsStraight line graphs4037/12 · May/June 2010 · Q77 Marks
The table shows values of the variables p and v which are related by the equation p = kvⁿ, where k and n are constants. ν 10 50 110 230 p 1412 151 53 19
- (i)Using graph paper, plot 1gp against lg vand draw a straight line graph. Use your graph to estimate[3]
- (ii)the value of n,[2]
- (iii)the value of p when v = 170.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2010). The mark or mark type is shown in brackets.
- M1 for attempt to take logs and plot graph
- A2,1,0 -1 for each error either in table or on graph.
- M1 for use of gradient
- A1
- M1 for use of graph or their equation
- A1
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