FOR PERPENDICULAR LINES THE PRODUCT OF THEIR GRADIENTS IS -1 MEANING IF WE ARW GIVEN THAT THE GRADIENT OF THE OTHER LINE IS -2 THE GRADIENT OF THE LINE PERPENDICULAR TO IT WILL BE
THE GENERAL EQUATION OF A STRAIGHT LINE IS Y=MX+C
LET US FIND THE VALUE OF C USING THE POINT GIVEN
THE EQUATION IS
GOODLUCK!