How making a T-table help yo you graph an equation? - Answers

A T-table allows you to put a selection of x coordinates on the left side of your table and the resulting values of y on the right side. So for example, say you need to graph y = 2x +3. Start with a selection of x values - my favorites are typically -2, -1, 0, 1, and 2 - and put them in your left column. Now, for each number, plug in your x value and find y. So your table would look like this (I've added the middle column only to show the arithmetic): x | Equation | y ---------------------------- -2 | 2*(-2)+3 | -1 -1 | 2*(-1)+3 | 1 0 | 2*(0)+3 | 3 1 | 2*(1)+3 | 5 2 | 2*(2)+3 | 7 Now, take these values and plot them on a graph. Then you can draw a line (or, if this were non-linear, a curve) that goes through all points you've plotted.