MAT 121 Lecture Notes - Abscissa And Ordinate, The Intercept
Document Summary
This unit is about the equations of straight lines. These equations can take various forms depending on the facts we know about the lines. So to start, suppose we have a straight line containing the points in the following list. There are many more points on the line, but we have enough now to see a pattern. If we take any (cid:1876) value and add (cid:884), we get the corresponding (cid:1877) value: (cid:882)(cid:3397)(cid:884)(cid:3404)(cid:884)(cid:481) (cid:883)(cid:3397)(cid:884)(cid:3404) (cid:885)(cid:481) (cid:884)(cid:3397)(cid:884)(cid:3404)(cid:886), and so on. There is a fixed relationship between the (cid:1876) and (cid:1877) co-ordinates of any point on the line, and the equation (cid:1877)(cid:3404)(cid:1876)(cid:3397)(cid:884) is always true for points on the line. Suppose we have a line with equation (cid:1877)(cid:3404)(cid:1876). Then for every point on the line, the (cid:1877) co- ordinate must be equal to the (cid:1876) co-ordinate. So the line will contain points in the.
