This is shown by the points on the line such as (10, 10) and (-4, -4). Graph A is \(y = -x\). All the coordinates have \(x\) and \(y\) values that are equal in magnitude but with opposite signs.

When the equation of a straight line is in the form \(y = mx + c\), \(m\) and \(c\) are numbers which give useful information about the graph of the line. In the equation \(y = mx + c\), \(m\) is ...