Function Tables
Grade 8 · Math · Functions · Kansas, USA
Lesson Summary
Use input-output tables to represent and understand functions.
Explanation
A function table lists input values and their matching outputs. You plug each input into the function rule to calculate the output. These tables are handy for spotting patterns and can help you graph the function later. If you see that every time the input goes up by 1 the output goes up by 3, you know the rate of change is 3.
Practice Questions
Q1: Complete the table for f(x) = 2x − 1 when x = 0, 1, 2, 3.
Answer: f(0) = −1, f(1) = 1, f(2) = 3, f(3) = 5.
Q2: A function table shows inputs 1, 2, 3, 4 with outputs 5, 8, 11, 14. What is the rule?
Answer: The rule is f(x) = 3x + 2, because the output increases by 3 each time and f(1) = 5.
Q3: If f(x) = x² and x = −2, what is f(−2)?
Answer: f(−2) = (−2)² = 4.
People Also Ask
What is Function Tables in Grade 8 Math?+
Function Tables is a lesson in the Functions chapter of Grade 8 Math. It is part of the Kansas, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Function Tables?+
Function Tables is taught in Grade 8 as part of the Math curriculum in Kansas, USA.
How can I help my child with Functions in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Functions topics.