SAT Mathematics : Graphing Inequalities
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Example Questions
Example Question #1 : Graphing Inequalities
For the following system of equations, what shape does the corresponding graph make:
It does not form a shape.
Rectangle
Square
Triangle
Triangle
When we graph the three inequalities as equations, we get the below graph. Testing a point within the triangle does in fact fulfill all three conditions, so the shape formed by the inequalities is a triangle. If a tested point within the triangle did not fulfill one or more conditions, then we would have chosen “it does not form a shape.”
Example Question #1 : Graphing Inequalities
Which of the following graphs correctly describes the system of inequalities:
After plotting the lines, shade the regions corresponding to each individual inequality. The area of intersection (in purple) is the solution to the system of inequalities. Another way to check your answer is to pick a point in all four regions delineated by the two equations and test those four coordinate points in the system of inequalities.
Example Question #21 : Graphical Representation Of Functions
For the following system of equations, what shape does the corresponding graph make:
Triangle
Square
Rectangle
It does not form a shape
Triangle
When we graph the three inequalities as equations, we get the below graph. Testing a point within the triangle does in fact fulfill all three conditions, so the shape formed by the inequalities is a triangle. If a tested point within the triangle did not fulfill one or more conditions, then we would have chosen “it does not form a shape.”
Example Question #22 : Graphical Representation Of Functions
Which of the following graphs correctly describes the system of inequalities:
After plotting the lines, shade the regions corresponding to each individual inequality. The area of intersection (in purple) is the solution to the system of inequalities. Another way to check your answer is to pick a point in all four regions delineated by the two equations and test those four coordinate points in the system of inequalities.
Example Question #23 : Graphical Representation Of Functions
Which of the following ordered pairs (x,y) is a solution to the system of inequalities:
This is the only coordinate point that fulfills the system of inequalities.
Example Question #24 : Graphical Representation Of Functions
If the system of inequalities 
I
III
II
I and II
I and II
The graph of the system of inequalities is shown below. The solution (in purple) does not go into region I or II.
Example Question #25 : Graphical Representation Of Functions
If the system of inequalities 
III
There are solutions in all 4 quadrants.
IV
II
There are solutions in all 4 quadrants.
The graph of the system of inequalities is shown below. The solution (in purple) is present in all four regions.
Example Question #26 : Graphical Representation Of Functions
If the system of inequalities 
There are solutions in all 4 quadrants.
IV
II
III
There are solutions in all 4 quadrants.
The graph of the system of inequalities is shown below. The solution (in purple) is present in all four regions.
Example Question #27 : Graphical Representation Of Functions
The graph shown above is best represented by which inequality?
The x-intercept is (4,0) so when 
Example Question #28 : Graphical Representation Of Functions
Which of the following are solutions to the system of equations 
I)
II)
III)
II
I, II, and III
I and II
I
I
With this question, it is important to recognize the system of inequalities utilizes the “greater than” sign, not the “greater than or equal to” sign. 
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