Question

ax + by = c.
i dont no what to do

Answer 1

what you just wrote have nothing to be done with! :-)

Answer 2

It is just the general form of a linear function

Answer 3

You have the standard form of a line typed in up there. What are you trying to do with it?

Answer 4

y – y1 = m(x – x1)
y – (–1) = 2(x – 2)
y + 1 = 2(x – 2)