What is the equation of the following line?

Given the graph below state whether or not the relation is a function, and give the domain and range.

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.

Anumber is equal to twice a smaller number plus 3. the same number is equal to twuce the sum of the smaller number and 1. how many solutions are possible for this situation