A straight line y=mx-5-2m meets x-axis and y-axis at point J and K respectively. Find the locus of the midpoint of JK when m is varied.

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- Apr 16th 2013, 03:17 AMTrefoil2727locus
A straight line y=mx-5-2m meets x-axis and y-axis at point J and K respectively. Find the locus of the midpoint of JK when m is varied.

- Apr 16th 2013, 05:46 AMzhandeleRe: locus
What have you tried? Do you have a formula for the midpoint in terms of m? If so, you should be able to treat m as a parameter and eliminate it. You'll get a function you can plot. See the pdf.

- Apr 16th 2013, 09:00 AMHallsofIvyRe: locus
- Apr 18th 2013, 11:37 PMTrefoil2727Re: locus
but the answer given does not have m..

- Apr 18th 2013, 11:43 PMMarkFLRe: locus