If three dozon cookies cost $9, what is the cost per cookie? I need help now plz this is a grade!

3 dollars) 9divied by 3 = 3

If the all cookies cost nine dollars 3 boxes cost 3 dollars each and 3 divided by 12 equals 0.25 meaning each cookie cost 25 cents

You will need to use the line equation in the point-intercept form that is represented as:

y - yo = m.(x - xo)

Where:
xo, yo -> Point coordinate
P (-3,5)

m -> Slope = -4

Calculating:

-> y - 5 = -4.(x - (-3))
-> y - 5 = -4.(x + 3)
-> y - 5 = -4x - 12
-> y = -4x - 12 + 5

-> y = -4x - 7
or...
-> 4x + y + 7 = 0