Always, sometimes, or never true: A vertical line is parallel to the y-axis?

Iam so stuck. what is the worked out answer for this question?

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

If rt is greater than ba, which statement must be true ?