Thursday, October 4, 2012

`(2, -3), 4x - 5y = -2` Find the distance between the point and the line.

Given (2, -3) `4x-5y=-2`


`4x-5y=-2`


`4x-5y+2=0`



A=4, B=-5, C=2, x1=2, and y1=-3



Find the distance between the point and the line using the formula


`d=|Ax_1+By_1+C|/sqrt(A^2+B^2)`


`d=|(4)(2)+(-5)(-3)+2|/sqrt(4^2+(-5)^2)`


`d=|8+15+2|/sqrt(16+25)=25/sqrt(41)=3.9`


The distance between the point and the line is 3.9 units.

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