Which CCSS Mathematics domain involves interpreting graphs that show how a function relates input and output values?

• A. Geometry
• B. Expressions and Equations
• C. Functions
• D. Statistics and Probability

Answer: (C)

Interpreting how a graph shows the relationship between input and output values is a task about a function. In the functions domain, you examine how each input (x) is paired with an output (y) and what the graph reveals about that link—how the output changes as the input changes, the rate of change, and the set of inputs for which the function is defined (the domain and range). This focus on reading and understanding the input-output relationship from a graph is what sets the functions domain apart from geometry (shapes and sizes), expressions and equations (writing and solving algebraic rules), and statistics and probability (data and chance).