WebWork #07, Problem 3

Has anyone been able to figure out part 3 of question 3 on webwork 07? I’m having a hard time, and I was pretty sure I got a solid answer but it’s still wrong. Help?

I’m pretty positive the correct answer is \langle 1,\pi(t), 12+3t \rangle, even though this is counted as being incorrect. I even plotted it on GeoGebra to check…

However, no matter how I type it in on the WebWork, it’s still counted as being wrong. Am I right or am I crazy?

You’re correct. I am able to view the “correct answer” and it’s missing a t for some reason.