Answer: y=5x/2 - 2.5
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(-2.5-2.5)/(0-2)
m=-5/(-2)
m=5/2
y=mx+b
y=5x/2 + b
-2.5=5(0)/2 + b
-2.5=0 + b
b=-2.5
y=5x/2 - 2.5
Because it can't be simplified.
There aren't like terms and there isn't fractions.
Powers distribute over multiplications:

So, you have

Now,
is simply 9.
As for
, we have to use the rule

to get

So, the final answer is

Question #4 would be y= x/2 and question #5 would be h=4w+6