She should use 4 grams of fat, and 2 calories per half cup serving
<h3>What are systems of equations?</h3>
This is a group of equations which may have none, one or more solutions.
From the question, we have the following system of equations
Where:
x represents the grams of fats, and y represents the number of calories
Next, we plot the graph of both equations (see attachment)
From the attachment, the solution to the system is:
(x,y) = (4,2)
Hence, she should use 4 grams of fat, and 2 calories per half cup serving
Read more about system of equations at:
