Functions and linear models
9 videos
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Pre-algebra - Functions and Linear Models: Why They Matter
Learn about functions and linear models through a savings example. Discover how to build equations, graph them, and use linear functions to predict outcomes.
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Pre-algebra - What Is a Function?
Learn what makes a function: the fundamental rule that each input maps to exactly one output. Includes examples using equations and graphs.
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Pre-algebra - Evaluating Functions from Equations and Graphs
Learn how to evaluate functions using equations and graphs. Understand how to plug in input values to find outputs, whether working with formulas or reading from a graph.
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Pre-algebra - How to Tell If Something Is a Function
Learn what makes a function valid: every input must map to exactly one output. Includes the vertical line test and examples using tables and graphs.
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Pre-algebra - Linear vs. Nonlinear Functions
Learn the difference between linear and nonlinear functions by examining constant vs. changing rates of change in tables and graphs.
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Pre-algebra - Slope and Y-Intercept in Real Life
Learn how linear equations work using a streaming service example. Understand slope as rate of change and y-intercept as the starting value in real-world contexts.
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Pre-algebra - Solving Linear Word Problems Step by Step
Learn to solve linear equations using a real-world example: calculating how many lawns to mow to afford a gaming headset using y=mx+b format.
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Pre-algebra - Comparing Linear Functions Across Representations
Learn how to compare linear functions by finding slope and y-intercept from equations and graphs, using a dog walking business example to understand rates and starting values.
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Pre-algebra - Graphing Linear Functions from Word Problems
Learn how to graph a linear function using a dog walking business example. Find two points from a word problem, plot them, and connect to create the graph.