where <math>m</math> is the gradient of the line and <math>c</math>is the value of the <math>y</math> coordinent when <math>x=0</math>, this is called the '''y-intercept''', e.g, where the line intercepts the <math>y</math>-axis. | where <math>m</math> is the gradient of the line and <math>c</math>is the value of the <math>y</math> coordinent when <math>x=0</math>, this is called the '''y-intercept''', e.g, where the line intercepts the <math>y</math>-axis. |