Is the relation shown in the table a function? Use the graph and justify your answer. x 2 4 8 10
y 3 2 0 –1
A coordinate grid from 0 to 9 on both axes.
A.
Yes. The relation is a function. The graph of the function is a straight line and has a constant rate of change.
B.
Yes. The relation is a function. The graph of the function is a curve.
C.
No. The relation is not a function. The graph of the relation does not pass through the origin.
D.
No. The relation is not a function. The graph of the relation is not a straight line.