1. Find k, the constant of proportionality, for the given graph. 2. Write an equation of the form y = kx for the relationship shown in the graph.

The answer is B or 15.

Step-by-step explanation:

the total money saved divided by the time is always 15

( - 4 , -7 )

all the lines must parallel  

step-by-step explanation:

coordinates of c = ( - 1 , 2 )

3 units left = ( -4 , 2 )

9 units down = ( - 4 , 11 )

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.