Did you know that different types of lines have different names? A vertical line goes up and down. A horizontal line goes left to right. Why not have a look around and see if you can find any ...

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 ...