Assessment Practice 7. Does the graph at the right show a proportional relationship
between x and y? Explain.
8
4
X
0
0
4
8
68
8. The graph at the right shows the relationship between the
weight of silver and the total cost. Which of the following
statements about the graph are true?
The point (0,0) means that 0 pounds of silver cost $0.00
The point (1, 17) shows the constant of proportionality.
The point (4, 68) means that $4.00 is the cost for 68 pounds
of silver.
The point (2, 34) means that 34 pounds of silver
cost $2.00 per pound
The graph shows a proportional relationship.
Total Cost (5)
34
0
2 4
Weight (pounds)
30 2-5 Graph Proportional Relationships