Step-by-step explanation:
You're asking why

let's transpose the first equation for y
-2x-6y=18
-6y=18+2x
6y=-18-2x
y=-18/6-2x/6
y=-3-⅓x as required
Answer:
c
Step-by-step explanation:
(4/5)*what = (2/3)
Multiply by 5/4
.. what = (2/3)*(5/4)
.. what = 5/6
Answer:
y = mx + b
Step-by-step explanation:
Use that form to find the slope.
Answer:
graph 2
Step-by-step explanation: