Question

What two pieces of information are needed when writing a linear equation?

Answer 1

The expression for a linear equation is

a) The slope-intercept form.

y = mx + b

m= (y2-y1)/ (x2-x1)

y-intercept is (0, b)

or

b) point-slope form

(y - y1) = m (x -x1)

________________

So then, we need:

a) the slope and a point ( y-intercept or other)

or

b) two points (to calculate the slope and use the other in the point-slope form )