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The line y=2x+4 is rotated through an angle of 90 degree in the plane about its point of intersection with (a) the X-axis, (b) the Y-axis. Find the equation of the image line under each transformation.

Hrishant Goswami , 14 Years ago
Grade 10
anser 1 Answers
Chetan Mandayam Nayakar

(a)X-axis, let image line be y=mx+c, 2*m=-1,m=-(1/2), 0=-(1/2)(-2)+c,c=-1,line is y=-x/2 -1

(b) Y-axis: let image line be y=mx+c, 2*m=-1,m=-(1/2),4=-(1/2)*0+c,c=4, line is, y=-x/2 +4

Last Activity: 14 Years ago
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