Question

What is the equation of the line that passes through the point (2,-1)and has a slope of 1

Answer 1

y = x - 3.

Explanation:

We use the point-slope form of the straight line:

y - y1 = m(x - x1) where m = slope and (x1, y1) is a point on the line.

So, for this line we have:

y - (-1) = 1(x - 2)

y + 1 = x - 2

y = x - 2 - 1

y = x - 3.