Math Problem Statement
Solve the following system of inequalities graphically on the set of axes below. State the coordinates of a point in the solution set.
y < 2x - 5
y ≤ -x - 2
Solution
To solve the given system of inequalities graphically:
- Inequalities:
Step 1: Understanding Each Inequality
-
For :
- The equation represents a straight line with slope and -intercept at .
- The inequality means the solution region is below this line. The line will be dashed to indicate that points on the line are not included.
-
For :
- The equation represents a straight line with slope and -intercept at .
- The inequality means the solution region is below or on this line. The line will be solid to indicate that points on the line are included.
Step 2: Graphing Both Lines
- Plot : Start at , use the slope (rise 2, run 1).
- Plot : Start at , use the slope (rise -1, run 1).
- Shade the regions:
- Below the dashed line .
- Below or on the solid line .
Step 3: Identifying the Solution Region
The solution region is where both shaded regions overlap. It lies:
- Below the dashed line .
- Below or on the solid line .
Step 4: Point in the Solution Set
Choose a test point within the overlapping region. For example:
- Point :
- Check against : → False.
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Math Problem Analysis
Mathematical Concepts
Linear Inequalities
Graphing Linear Equations
Coordinate Geometry
Formulas
Slope-intercept form: y = mx + b
Theorems
Concept of solution region for inequalities
Suitable Grade Level
Grades 8-10
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