Jing's+Notes+-+Graphing+Relations+and+Choosing+Axis+Scales

__ Linear Relations  __ //__ Graphing a relation given a table of values or an equation:  __// When graphing a relation and you’re given a **table of values**… Take both sides of the table and think of one side as x, one side as y. Then, based on the values displayed on the table that you’re given, plot the points on your graph. For each column in your table, you plot a point. (With your //x// and //y// values.) When graphing a relation and you’re given an **equation**… To find the pair of co-ordinates in a linear equation, just substitute either x or y with any value, then solve the equation. (TIP: The easiest way to plot the points and to see the trend is to find the x-intercept or the y-intercept. The x-intercept is a pair of co-ordinates where the value of y is 0. The y-intercept is the same thing except instead of y being 0, x is 0. ) //__ Choosing axis scales suitable for domain and range:  __// Choosing an axis scale suitable for a **range**… Because the range is all the possible values of y, when finding an axis scale, you would want to find the highest and lowest values that you are given for the particular relation. For example, if you were given the pairs, (2, 3), (3, 4), and (4, 5), the range would be 3, 4, and 5, which you would graph accordingly. (You would chose a scale of ones, instead of tens. (2, 4, 6, 8, 10, etc.)   Choosing an axis scale suitable for a **domain**…    Because the domain is all the possible values of x, when finding an axis scale, you would want to find the highest and lowest values that you are given for the particular relation. For example, if you were given the pairs, (2, 3), (3, 4), and (4, 5), the domain would be 2, 3, and 4, which you would graph accordingly. (You would chose a scale of ones, instead of tens. (2, 4, 6, 8, 10, etc.)