Freight train is carrying goods across the country. The number of gallons of fuel it has used varies directly with the distance it has traveled. See the graph elow.
1
450 -
400
350
300
250
Number
of gallons
used
200
150
100
50
0
50 100 150 200 250 300 350 400 450
Distance traveled (miles)
(a) How many gallons does the train use per mile?
DO
gallon(s)
Х
$
?
(b) What is the slope of the graph?

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.