PRACTICE
Give the coordinates of each point shown in Fig. 11-6.
ANSWERS
1. A (4,2)
2. B (2,5)
3. C (3, 4)
4. D (1, 5)
5. E (5, 0)
6. F (0,1)
Linear Equations
An equation such as xþ2y¼6 is called alinear equationin two variables. A
solution to the equation is a set of ordered pairs (x, y) such that when the
values are substituted for the variables in the equation, a closed true equation
results. For example (2, 2) is a solution, since
CHAPTER 11 Graphing 207
Fig. 11-6