Q.NO.1-Straight Line Equations, Gradient of a line and Perpendicular Lines.

[@alevelcrashcourses]

NOTE: At 7:22 , THE EXPRESSION ON THE RIGHT HAND SIDE WAS SUPPOSED TO BE X+1 BUT HERE IT IS GIVEN AS X+3, FOLLOWING THAT THE VALUE OF R SHOULD BE 25, WHEREAS HERE IT IS 27. PLEASE CORRECT THIS OUT! THANK YOU SO MUCH FOR YOUR CONSIDERATION!

[@amrkhamis6612]

for part b, 7:21 it must be X+1

[@amrkhamis6612]

therefore r=25

[@alevelcrashcourses]

Exactly, dear Thank you so much for pointing that out, I will update that soon.