Write an equation of a line given its slope and a point on the line
Let m represent the slope of a line and (x1, y1) represent a given point on the line. Let (x, y) represent any other point on the line. See Figure . Then by the slope formula,
m(x – x1) = y – y1 Multiply by x 2 x1
y – y1 = m(x – x1). equation of a line.