SAT Math: Number Lines (w/ example)

Once or twice per test, the SAT will ask you to interpret values on a number line.

When a number line question includes undefined points (labeled by variables), estimate the values of those points before answering the question.

Number Line Example:

See Comments for the answer.

Tip:
Number line questions often include fractions and negative numbers.
Subtracting a negative number moves the value to the right on the number line (positively).
Multiplying a number by a fraction makes the number smaller.

From SAT Unlocked, which includes a complete list of the number line practice questions found in The Official SAT Study Guide.