Evaluating function expressions

The  exercise appears under the Algebra I Math Mission. This exercise practices evaluating functions at given inputs.

Types of Problems
There is one type of problem in this exercise:


 * 1) Simplify the expression using the graph: This problem provides the graph of two functions and an expression using those two functions. That student is expected to correctly evaluate the expression and write the correct answer in the space provided.Eewfn1.png

Strategies
Knowledge of function notation and experience with functions would help to ensure success on this exercise.
 * 1) The color coding is consistent, that is, f(x) is blue and g(x) is red in all instances.
 * 2) The final answer submitted will be an integer.
 * 3) Speed can be increased by using a ruler or piece of paper to line up the input and outputs of the function with axes.
 * 4) Accuracy can be increased by writing down the values on scratch paper before submitting the answer.

Real-life Applications

 * 1) Functions are used to model real-life situations so an ability to understand how to evaluate them is important to using them.