Unit 6 (practice test)

Front

What is the opposite of a number?

Back

The opposite of a number is the number that is the same distance from zero on the number line but in the opposite direction. For example, the opposite of 7.5 is -7.5.

Front

What does the inequality k < 3 represent on a number line?

Back

The inequality k < 3 represents all numbers less than 3 on a number line. It is often represented with an open circle at 3 and a line extending to the left.

Front

Back

Front

What does reflection over the x-axis mean?

Back

Reflection over the x-axis means that for every point (x, y) on a graph, there is a corresponding point (x, -y). This flips the graph upside down.

Front

Is the statement 0 < -3 true or false?

Back

False. Zero is greater than -3.

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions and shows that one is greater than, less than, or not equal to the other.

Front

What is the definition of a number line?

Back

A number line is a straight line with numbers placed at equal intervals along its length, used to represent real numbers.

Front

What does it mean for a number to be negative?

Back

A negative number is a number that is less than zero, represented with a minus sign (-). For example, -5 is a negative number.

Front

What is the solution to the inequality x + 5 > 10?

Back

To solve x + 5 > 10, subtract 5 from both sides. The solution is x > 5.

Front

What is the opposite of -4?

Back

The opposite of -4 is 4.