Slope 3, through (1,2)

I always think of it as 

gradient = gradient

Then all line formulas are the same. :)

$$3=\frac{y-2}{x-1}$$

then simplify :)

I think this person wants to write an equation of a line using the slope and a point. We will actually have the same answer as Melody....it will just look a little different!!!

So using the point-slope form, we have

y - y₁ = m(x - x₁)       where m is the slope and (x₁, y₁) is the given point   ..... so we have

y - 2 = 3(x - 1)          add 2 to each side and distribute the "3" across the terms in the parentheses

y = 3x - 3 - 2            simplify

y = 3x - 5                 

Note.....putting our given values of 2 and 1 in for x and y will make this equation true.....so we know we have done things correctly !!!