document.write( "Question 840202: a) Show that the point B (-3,-2) lies on the
\n" ); document.write( "circle defined by x^2+y^2=13.\r
\n" ); document.write( "\n" ); document.write( "b) Find an equation for the radius from the
\n" ); document.write( "origin O to point B.\r
\n" ); document.write( "\n" ); document.write( "c) Find an equation for the line that passes
\n" ); document.write( "through B and is perpendicular to OB. \n" ); document.write( "
Algebra.Com's Answer #506018 by Alan3354(69443)\"\" \"About 
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a) Show that the point B (-3,-2) lies on the
\n" ); document.write( "circle defined by x^2+y^2=13.
\n" ); document.write( "Sub -3 for x and -2 for y
\n" ); document.write( "-----------------------------\r
\n" ); document.write( "\n" ); document.write( "b) Find an equation for the radius from the
\n" ); document.write( "origin O to point B.
\n" ); document.write( "y = 2x/3
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\n" ); document.write( "\n" ); document.write( "c) Find an equation for the line that passes
\n" ); document.write( "through B and is perpendicular to OB.
\n" ); document.write( "That's a line tangent at B
\n" ); document.write( "The slope is -3/2 (the negative inverse of the slope in b) above)
\n" ); document.write( "Also, the slope of a tangent line of a circle about the Origin is
\n" ); document.write( "-x/y
\n" ); document.write( "y+2 = (-3/2)(x + 3)
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