Y = -2 + 6 should be the equation
INCREMENT
430-400=30
PERCENTAGE
(30/400)*100
(30/40)*100
300/40=
7.5% is your final answer
I hope I could help
If you're talking about inequality graphs, you shade the area where any point in the shaded area can solve the inequality, if I remember correctly. I can't exactly show you how much to shade.
It should be 100 because it has to add up to 180 and 50+30=80 so the third angle must be 100
