Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to ...

Graphs of two or more straight lines can be used to solve simultaneous linear equations. The graph of a straight line can be described using an equation close equationA mathematical statement ...

Linear functions are widely used in economics, physics, finance, and data analysis. A positive slope indicates that both variables increase together; a negative slope means one decreases as the ...