What is the slope of the line of best fit?

A.
1/6 miles per hour
B.
6 miles per hour
C.
3 miles per hour
D.
12 miles per hour

Need on this one asap im almost done with this subject

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.