Expression for slope of line passing through given points
a) Show that the slope of the line passing through the two points (3,9) and (3+h,(3+h)^2) is 6+h.
b) Write down then simplify as much as possible, an expression for the slope of the line passing through the two points (a,1/a) (x,1/x).
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Passes through (0,-1) and has the same slope as the line 3x+4y=12. Passes through (6,2) and has the same x-intercept as the line -2x+y=1.
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Write down then simplify as much as possible, an expression for the slope of the line passing through the two points (a,1/a) (x,1/x).
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