16ExampleSolve and graph the solution set on a number line:
17Checking the solution of a linear inequality on a Graphing Calculator Separate the inequality into two equations.The intersection of the two lines is at (1,3). You can see this because both y values are the same, – 3.The region in the red box is where the values of y1 is greater than y2.Y2=-x+4The region on the graph of the red box is where y1 is greater than y2. This is when x is greater than 1.Y1=2x+1
29ExampleA national car rental company charges a flat rate of $320 per week for the rental of a 4 passenger sedan. The same car can be rented from a local car rental company which charges $180 plus $ .20 per mile. How many miles must be driven in a week to make the rental cost for the national company a better deal than the local company?