Answer:
Step-by-step explanation:
18.
slope of line y=2x-5 is 2
slope of line ⊥ to y=2x-5 is
m=-1/2
eq. of reqd. line through (10,6) with slope -1/2 is
y-6=-1/2(x-10)
multiply by 2
2y-12=-x+10
2y+x=10+12
2y+x=22
2y=-x+22
y=-1/2x+11
19.
slope of line y=12x+5,m=12
eq. of line through (5,2) with slope 12 is
y-2=12(x-5)
y-2=12x-60
y=12x-60+2
y=12x-58
compare with y=mx+b
b=-58
