Vertical lines have equations of the form \(x = k\). Horizontal lines have equations of the form \(y = c\). Draw the graph of \(x = 3\). Mark some points on a grid which have an \(x\)-coordinate ...

The answer to two down in the Nov. 11 New York Times Mini Crossword is “XAXIS.” A typical two-dimensional graph has two axes: the x-axis (horizontal) and the y-axis (vertical). The x-axis runs ...

In order to work with gradients and straight lines successfully, a good understanding of coordinates and linear graphs is ... in \(x\), or the vertical divided by the horizontal.