Given:
The gluten ratio is 13 mg per L of food.
Note that
1 L = 1000 mL (milliliter)
1 mg = 10⁻³ g
1 μg = 10⁻⁶ g
Therefore
1 mg = 1000 μg
The gluten ratio is

Answer: The gluten ratio is 13 μg/mL
Answer: Neither linear nor exponential (choice B)
Through interpolation, a graphing calculator, or trial and error, you can find the function to be f(x) = 2x^2. This is a polynomial function. It is not linear as it graphs out a curved parabola. It's not exponential either since the exponent isn't a variable. This also can be considered a power function.
D
graph becomes slimmer, so definitely be multipled 1/2