It's C they are just out of order for the years.
f(x)=35.5x+6
For each year your plug in the snow total for x and solve
2006 x=53 so 35.5(53)+6=1887.5
2007 x=42 so 35.5(42)+6=1497
2008 x=55 so 35.5(55)+6=1958.5
2009 x=63 so 35.5(63)+6=2242.5
2010 x=58 so 35.5(58)+6=2065
2011 x=47 so 35.5(47)+6=1674.5
Hope that helps.
There are 3 choices out of 8 that include two tails. 3/8 = .375 = 37.5%
Hope this can help
In step one, you are supposed to add 25 to both sides, because if you just subtract, it would be -5x-50=53
