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Math · 8th Grade
What Makes a Function
One input, one output — and the two tests that check it.
How to use it
Ask whether any input appears twice with different outputs. That is the only disqualifier.
Free · print-ready PDF · US Letter and A4
- Grade
- 8th Grade
- Ages
- 13–14
- Subject
- Math
- Pages
- 1
The rest of the 8th Grade wall
49 more posters, all free to print — 11 of them here.
The Product RuleSame base, multiplying? Add the exponents.The Quotient RuleSame base, dividing? Subtract the exponents.The Power of a Power RuleA power raised to a power? Multiply the exponents.Zero and Negative ExponentsWhy anything to the power zero is one, and where a negative exponent really lives.Scientific NotationVery big and very small numbers, written so you can actually compare them.Square and Cube RootsThe numbers worth knowing by sight, and how to simplify the rest.SlopeRise over run, and the four kinds of slope a line can have.Slope-Intercept Formy = mx + b — the form you can graph without doing any working.Three Forms of a LineSame line, three ways of writing it — and what each is good for.Systems of EquationsTwo lines, three methods, and what it means when there is no answer.Linear FunctionsSlope, intercepts, the three forms of a line, and what each one is good for.