Graphing Inequalities - SAT Math

Card 0 of 12

Question

For the following system of equations, what shape does the corresponding graph make:

Answer

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.”

Screen shot 2020 09 29 at 10.05.26 am

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Question

Which of the following graphs correctly describes the system of inequalities:

Answer

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.

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Question

For the following system of equations, what shape does the corresponding graph make:

Answer

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.”

Screen shot 2020 09 29 at 11.41.58 am

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Question

Which of the following graphs correctly describes the system of inequalities:

Answer

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.

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Question

Which of the following ordered pairs (x,y) is a solution to the system of inequalities:

Answer

This is the only coordinate point that fulfills the system of inequalities.

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Question

Screen shot 2020 09 29 at 11.46.39 am

If the system of inequalities and is graphed on the xy- plane above, which quadrant contains no solutions to the system?

Answer

The graph of the system of inequalities is shown below. The solution (in purple) does not go into region I or II.

Screen shot 2020 09 29 at 11.48.13 am

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Question

Screen shot 2020 09 29 at 12.38.38 pm

If the system of inequalities and is graphed on the xy- plane above, which quadrant contains no solutions to the system?

Answer

The graph of the system of inequalities is shown below. The solution (in purple) is present in all four regions.

Screen shot 2020 09 29 at 12.40.48 pm

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Question

Screen shot 2020 09 29 at 12.41.34 pm

If the system of inequalities and is graphed on the xy- plane above, which quadrant contains no solutions to the system?

Answer

The graph of the system of inequalities is shown below. The solution (in purple) is present in all four regions.

Screen shot 2020 09 29 at 12.43.48 pm

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Question

Screen shot 2020 09 29 at 12.44.36 pm

The graph shown above is best represented by which inequality?

Answer

The x-intercept is (4,0) so when equals 0, , and the y-intercept is (0,3) so when equals 0, . These points only work for a line corresponding to . To determine which direction the inequality points, you can plug in any point. If we use (0,0), , so this is the direction the inequality must face.

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Question

Which of the following are solutions to the system of equations and ?

I)

II)

III)

Answer

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. does not fulfill . appears to fulfill both conditions but . 18 is not greater than 8, leaving only as a possible solution.

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Question

Which of the following are solutions to the system of equations and ?

I)

II)

III)

Answer

With this question, it is important to recognize the system of inequalities utilizes the “greater than or equal to” sign. does not fulfill wither inequality. and fulfill both conditions.

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Question

Which of the following graphs correctly describes the system of inequalities:

Answer

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.

Compare your answer with the correct one above

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