Quarter 2 Reviewer

TRUE or FALSE: Ax + By ≥ C is a linear inequality in two variables

Which of the following statements best describes linear inequality in two variables?

• A.    It is an equation with a degree of 1.

• B.    It is an equation that makes a straight line when graphed.

• C.    Written in the form Ax + By = C

• D.    It is in the form Ax + By ≤ C, where A, B, and C are real numbers, but A and B cannot be equal to 0.

A small company sells nylon and leather bags. The profit made on a nylon bag is 100 pesos, while the profit made on a leather bag is 250 pesos. If the number of nylon bags is x and the number of leather bags is y, create an inequality that can be used to find possible combinations of bags that must be sold to make a profit of more than 82, 500 pesos.

• 100x + 250 y ≥ 82, 500

• 100x + 250 y > 82, 500

The boundary line of the graph of x – y < 3 has an x – intercept equal to          

At what point will the graph of x – y < 3 intersect the y – axis?

Which of the following cannot be used as a representation of relation?

• Ordered pairs 

• Flow chart

• mapping/diagram

• Table of values

Aside from one-to-one, which relations describe a function?

Which of the following relations represents a function?

• {(1,1), (1,-1), (4,-2), (4,2)}

• {(0,3), (0,-3), (3,0), (-3, 0)}

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Which of the following graphs DOES NOT represent a function?

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In y = 2x + 6, which is the dependent variable?