Does anyone happen to know this answer??

Which equation represents a line that passes through the point (9, -4) and has a slope of 3/5?

Amotorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning. the total time for the trip was 8.0 hours. use this information to find the speed of the current.

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x