15. Which function has the greatest rate of change?
A) y= -5x
B) {(-1,-2), (1, 2), (3, 6), (5, 10), (7, 14)}
C)A fitness club charges a $200 membership fee plus monthly fees of $25.
D) y= 3x - 16
please explain!!

Which of these choices show a pair of equivalent expressions?

Find x to the nearest hundredth place

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?