Answer:
You start at -1 because its your y-intercept and from there you go 7 down and 1 to the right
Step-by-step explanation:
1. - 3, +4 2. +2, - 5 3. +9, +1
set mary is x years old, and helen is y years old.
first sentence:x=2y
second one:4(y-8)=x+4
bring x=2y in 4(y-8)=x+4
=>4y-32=2y+4
=>2y=36
=>y=18
=>x=36
mary:36
helen:18
2.5
