I think its x-5. I think it is i'm not sure tho
Use PEMDAS:
P Parentheses first
E Exponents (ie Powers and Square Roots, etc.)
MD Multiplication and Division (left-to-right)
AS Addition and Subtraction (left-to-right)
and 

Y = -4x + 4
In order for a function to be parallel to another, they must have the same slope but different intercepts (or else they'd be the same line).
This equation has the same slope and the same intercept, so it is parallel.
Hope this helps!
I = PRT/100 where P = pricipal, R = rate and T = number of years. I = interest.
So answer is (3250 * 1.7 * 3) / 100 = $165.75