Find the equation of the line tangent to the curve, f(x) = 2 3
x
2 −
x
6
, at the point ቀ−1,
5
6
ቁ.

Lets form an equation from this problem.
Let x=the mystery amount of raisins in the trail mix.
Our equation would be:
To solve for x we first multiply both sides by 12. This gives us    Next, we subtract 3.6 from both sides to get x=4.8
Ingrid used 4.8 pounds of raisins in the trail mix