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question mark

the line y=2x-4 is rotated throgh 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.

Ans: (a) x+2y=2

(b) x+2y+8=0

Burhan Tayyab , 13 Years ago
Grade
anser 1 Answers
shaswat roy

Last Activity: 13 Years ago

since it is rotated by 90 degrees the eqn of the image line in both cases will be y = -x/2 + c  (where c is arbitrary const)

for part (a) satisfy (2,0) to get c and for part(b) satisfy (0,-4)

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