Some members of the track team are practicing running along a marathon course. Their position along the course is given by the variable d, in miles. The variable t represents the amount of time after 9:00 a. m., in hours. Some runners started running before 9:00 a. m. The position of runner Cheng is given by d=8(t+0.5). The position of runner Antonelli is given by d=4+8t. Which is true?

Runner Antonelli will catch and pass runner Cheng.

Runner Cheng is running at a fixed distance behind runner Antonelli.

Runner Cheng and runner Antonelli are at the same point along the course.

The runners started together, but now runner Antonelli is ahead.
(gives 15 points)