Please help. Just which options

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?