Final answer:
The graph that represents the solution to the system of inequalities x + y < 4 and 2x − 3y ≥ 12 is (b) in Figure 12.4.
Step-by-step explanation:
The solution to the system of inequalities x + y < 4 and 2x − 3y ≥ 12 can be found by graphing the inequalities on the same coordinate plane and identifying the shaded region that satisfies both inequalities.
To graph x + y < 4, we first graph the line x + y = 4. Since the inequality is < (less than), the line will be dashed. Then, we shade the region below the line to represent values that satisfy the inequality.
Next, to graph 2x − 3y ≥ 12, we graph the line 2x − 3y = 12. Since the inequality is ≥ (greater than or equal to), the line will be solid. Then, we shade the region above the line to represent values that satisfy the inequality.
The region that is shaded by both inequalities is the solution to the system of inequalities. The correct graph representation of the solution would be (b) in Figure 12.4, where one line slopes upward to the right and the other line is horizontal.