Answer:
a
Step-by-step explanation:
It begins at the point (0, -1200). 0 tickets sold, $1200 spent.
$5 for a ticket means that slope =5.
(600, 1800) and (0,-1200)
m= (1800-(-1200))/(600-0)=3000/600=5
slope=5
Answer is a.
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