Which angles are adjacent angles

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

In exponential growth functions, the base of the exponent must be greater than 1,how would the function change if the base of the exponent were 1? how would the fiction change if the base of the exponent were between 0and 1

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?