The vertical resolution (number of horizontal lines) on a TV or computer screen. The term typically is used with TVs; for example, HDTVs have 720 or 1,080 lines, while analog TVs used 525 or 625 ...

The line \(y = 1\) is a horizontal line which passes through 1 on the \(y\)-axis. The shape has been reflected in the line \(y = 1\). The equation of a straight line graph has the form \(y = mx ...

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 ...