Lab 3: Graphing Calculator: Calculating Points on a Graph
Use a graphing calculator in Grade 10 to evaluate functions at specific x-values, trace graphs to find coordinates, and use table features to analyze function behavior systematically.
Key Concepts
New Concept A graphing calculator can be used to calculate $y$ values and zeros of equations.
What’s next Next, you’ll learn the keystrokes to find key points on a graph, including zeros, minimums, maximums, and intersections.
Common Questions
How do you use the TRACE function to find coordinates on a graph?
After graphing a function, press TRACE. Use left/right arrows to move along the curve. The x and y coordinates of the current point display at the bottom of the screen.
How do you use the TABLE feature to evaluate a function at multiple x-values?
Press 2nd → TBLSET to set the starting x-value and step size, then press 2nd → TABLE. The calculator displays a table of x and f(x) values automatically.
How do you calculate f(5) for the function currently graphed on the calculator?
Press 2nd → CALC → value, type 5, press ENTER. The calculator evaluates the function at x=5 and displays the result.