Can somebody break this down step by step ?

Karianne and lucius are analyzing a linear function on a graph. karianne says that unit rate is equal to rate of change, but that slope is calculated differently. lucius says that unit rate, rate of change, and slope are calculated the same way. who is correct? explain your answer.

Which system of linear inequalities is represented by the graph? !

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4