I'm having alot of trouble with this

What is the slope of a line that is perpendicular to y = 3x + 1

The table shows the distance traveled over time while traveling at a constant speed.

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39