One batch = 1/4
One whole cup is 4 batches
3/4 a cup is 3 batches
If you add together one and 3/4 you get 7 Batches
6 x -5 = -30
When you multiply a positive number by a negative one, you get a negative number.
X^2 -6x -8 is a parabola in ax^2 + bx + c form
The axis of symmetry is -b/2a = 3
The vertex is (3,f(3)) = (3,-17)
The x-intercept is f(x)= 0 where x=-1.123, 7.123
Graphing: it opens upwards
A(-1;14), x=-1, y=14
B(2;-10), x=2, y=-10
General equation for linear function is 
Let's solve system of equations

9+3=12, so. it cost $12 per 1000. We need to multiply 12 by 336000
336,000(12)=$4,032 tax to pay per year