Answer:
formula is y= mx + c (c=y intercept)
1) slope= m= -0.75, y intercept = -2
y= -0.75x - 2
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2)slope=m=0.5, y intercept = 8
y= 0.5x + 8
1 hr plus 20 minutes
Then that answer divided by 15
Then that answer multiply by 3/4
ratio of adults to students can be written as a fraction
adult tickets / student tickets
140/210 can be simplified to 14/21
14/21 can be simplifed to 2/3