Equation of a Straight Line. The equation of a straight line is usually written this way: y = mx + b. (or 'y = mx + c' in the UK see below) . Every straight line can be represented by an equation: y = mx + b. The coordinates of every point on the line will solve the equation if you substitute them in the . . of two-variable linear equations, and how to interpret it to find the slope and y-intercept of their line. . [I want to see a proof using the general form y=mx+b!] Ever need to know the slope of your driveway? Sub some into y=mx+b. Ever need to know at what angle your ladder is standing at if it was on a graph? y=mx+b Cosa rappresenta l'equazione y=mx+q? Potreste dirmi tutte le prorietà di cui gode y=mx+q e cosa indicano m e q? 15 mar 2015 - 'b', also called the y-intercept, is the point where the line given by the equation [math]y=mx+b[/math] intercepts the Y-axis. Naturally, it is also the vertical . Covers the 'slope-intercept', or 'y = mx + b', form of straight-line equations.