Question

Write an equation of a line in point-slope form that passes through the point (1,2) and whose slope is 3.

Answer 1

Yes. thats a good one.

So do you know the equation of line if (x1,y1) = (1,2) and slope M = 3 ?

Answer 2

i mean the formula used to find it.

Answer 3

y=f(x) ???

Answer 4

point slope form is

y-y1 = m(x-x1)

in this case

m = 3 (slope)
x1 = 1 (x coordinate of given point)
y1 = 2 (y coordinate of given point