integration – Which units describe the area under a curve?

A car traveling in a straight line from its starting position at a speed of 65 miles per hour for 3 hours is represented by the function v(t) where t is the number of hours traveled. What units describe the area under the curve?

  • Miles per hour
  • Miles per hour per hour
  • Hours
  • Miles

I just don’t know what to do at all. I completely do not understand the problem. You don’t even have to give me an answer I just want an explanation and I can’t find any similar problems on google. My guess is that the answer is miles per hour per hour because each square would be a mile per hour and then all together…nevermind I don’t understand. Please help.