Praxis Mathematics examination for teacher certification.
Functions show how one quantity depends on another. Graphs provide a visual way to understand these relationships and spot trends.
A function assigns each input exactly one output. It’s like a machine: put something in, get something out.
Plotting points on a coordinate plane helps you see patterns, such as lines (linear functions) or curves (quadratic functions).
Reading graphs helps you analyze data and make predictions—skills essential for teaching and real-world decision-making.
\( f(x) = mx + b \) is the equation for a straight line, where \( m \) is the slope and \( b \) is the y-intercept.
\[f(x) = mx + b\]
Graphing the line \( y = 2x + 1 \) on a coordinate plane.
Interpreting a temperature vs. time graph to find daily trends.
Functions and their graphs show how quantities change together.