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

One way to assess this fluctuating data is to add a linear trend line to the Excel 2013 graph. This visual element considers all the data and displays the overall direction the values are taking.

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 ...

GCSE WJEC Equations of lines – WJEC Straight-line graphs Look at how to plot in all four quadrants of a graph and draw straight lines. We can determine information about the gradient and ...

There are no straight-line segments on a quadratic graph. The coordinates (x, y) are plotted and joined by drawing a freehand curve. Two consecutive horizontal points are joined by a rounded curve ...