Write and Graph Inequalities

Front

What does the inequality x ≤ 9 mean?

Back

x can be any number less than or equal to 9.

Front

When graphing the inequality x ≤ 9, which direction does the arrow point?

Back

The arrow points to the left.

Front

How do you write the inequality for 'There are fewer than 20 days left in October'?

Back

x < 20.

Front

What is the correct inequality for 'To use one stamp, your domestic letter must weigh under 3.5 pounds'?

Back

m < 3.5.

Front

What does the symbol '≤' represent in inequalities?

Back

It means 'less than or equal to'.

Front

What does the symbol '≥' represent in inequalities?

Back

It means 'greater than or equal to'.

Front

If x > 5, what does this mean in terms of values for x?

Back

x can be any number greater than 5.

Front

How would you graph the inequality x > 5?

Back

Draw a number line, put an open circle on 5, and shade to the right.

Front

What is the difference between an open circle and a closed circle on a graph?

Back

An open circle means the number is not included; a closed circle means it is included.

Front

If a graph shows a line with an arrow pointing to the right starting from 3, what inequality does this represent?

Back

x ≥ 3.