We have to find the slope of the line perpendicular to . To find the slope, solve the equation for y.
Step 1: Calculate the slope (m) from the coordinates: (y2 - y1) / (x2 - x1) and reduce the resulting fraction to the simplest form. Result: Now you have calculated all three variables (A, B and C) for the General Form Linear Formula. Example: To calculate the General Form Linear Equation for a line...The slope m of this line - its steepness, or slant - can be calculated like this: m = change in y-value change in x-value. The equation of any straight line, called a linear equation, can be written as: y = mx + b, where m is the slope of the line and b is the y-intercept.