Final answer:
The question pertains to evaluating a piecewise function at a specific input value, but the necessary function definition is not provided. The information given mistakenly involves solving a quadratic equation and other unrelated topics.
Step-by-step explanation:
The student's question asks to evaluate the piecewise function for f(-3). However, the provided solution information does not directly answer the question because it discusses a quadratic equation using the quadratic formula, which is not related to evaluating a piecewise function at a specific value. To provide the correct answer, we need the definition of the piecewise function, which includes the specific rules for different ranges of the input variable x.
If the piecewise function were provided, the solution would involve determining which piece of the function applies when x is -3, and then using that piece of the function to calculate the value of f(-3).
The secondary information provided in the question seems to be unrelated fragments concerning electric field lines, current flow, and positive slope functions, which are not pertinent to the primary question of evaluating a piecewise function.