a) slope/gradient,m = tan of the angle of the line with positive x-axis
tan (180-45) = tan 1350
= -1
b) equation in the form y =mx+c
taking point (4,0), x=4,y=0 and m=-1
therefore
0=1- × 4 +c
0+4 =c
Thus the equation ,
Y = -x +4
joseph kieti answered the question on November 16, 2017 at 15:08
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