15 pts and please show steps <3 An aquarium is being filled with water. the graph shows the height of the water over time as the aquarium is being filled.

Which statement best describes the rate of change for this situation?

A. The height of the water increases 20 inches per second
B. The height of the water increases 1 inch per second
C. The height of the water increases 5 inches per second
D. The height of the water increases 2.5 inches per second

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Bring the fraction a/a-4 to a denominator of 16-a^2

Ahypothesis is: a the average squared deviations about the mean of a distribution of values b) an empirically testable statement that is an unproven supposition developed in order to explain phenomena a statement that asserts the status quo; that is, any change from what has been c) thought to be true is due to random sampling order da statement that is the opposite of the null hypothesis e) the error made by rejecting the null hypothesis when it is true