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# Math......the gradient of the lines? Watch

1. the line P has gradient 2/3 and pass through point (6,12)
the line Q has gradient -1 and pass through point (5,5)
the line p meets the y-axis at A and the line Q meets the x-axis at B.work out the gradient of the line joining the points A and B
(Hint First work out the gradient if the line joining the points P and Q)
2. (Original post by reb0xx)
the line P has gradient 2/3 and pass through point (6,12)
the line Q has gradient -1 and pass through point (5,5)
the line p meets the y-axis at A and the line Q meets the x-axis at B.work out the gradient of the line joining the points A and B
(Hint First work out the gradient if the line joining the points P and Q)
Work out the equations for P and Q first using y-y1=m(x-x1). Then find the points A and B, setting x or y=0 in P and Q respectively. Then find the gradient between A and B (i.e. Difference in y values/Difference in x values.)

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Updated: December 9, 2010
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