A graph titled Health Club Rates has a number of family members on the x-axis and Monthly cost (dollars) on the y-axis. For 2 family members, the cost is 84; 4 family members, 168; 6 family members, 252; 8 family members, 336.
Use the graph to find the unit rate.
$24 per person
$42 per person
$32 per person
$84 per person