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### Grade 5 - Mathematics13.3 Functions and Equations

 A function is a relation. It relates each of its inputs to exactly one output. f(x) = (2*x - 2) is an example for a function. Example: f(x) = x + 2 is a function. What is the value of the function for x = 7 Substitute 7 for x f(5) = 7 + 2 = 9 Answer: 9 Example: f(x) = (5*x +2) is a function. What is the value of the function for x = 5 Substitute 5 for x f(5) = (5 * 5 + 2) Answer: 27 Directions: Answer the following questions. Also write at least 5 examples of your own.
 Q 1: f(x) = (3*x - 2) is a function. What is the value of the function for x=23462 Q 2: y = 6-x is an equation. What is the value of y for x=1?1675 Q 3: f(x) = x/3 is a function. What is the value of the function for x=12431236 Q 4: A function does the same thing to each number you plug into it.FalseTrue Q 5: f(x) = x * 2 is a function. What is the value of the function for x=3326Unknown Q 6: y = x + 2 is an equation. What is the value of y for x=3?3Cannot be solved25 Q 7: f(x) = x + 5 is a function. What is the value of the function for x=775Unknown12 Q 8: Which of the following are NOT inverse operations?Squares and Square RootsMultiplication and AdditionMultiplication and DivisionAddition and Subtraction Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!