Do Now Solve. 1. x + 4 = y – 2.3 = z = = 8 x = 15 y = 10.1 z = 30 Course Functions, Tables, and Graphs w9w9 w = 72 Hwk: p 39

EQ: How do I use function tables to generate and graph ordered pairs? Course Functions, Tables, and Graphs M7A1.b Simplify and evaluate algebraic expressions, using commutative, associative, and distributive properties as appropriate; M7A3.a Plot points on a coordinate plane; M7A3.b Represent, describe, and analyze relations from tables, graphs, and formulas

Insert Lesson Title Here 1. Write and graph the ordered pairs from the table. Course Tables and Graphs xy 26 –1010 –4 –6–8 x y –4 4 4 –8 8 8 –2 –6 – –6 –10 –2 The ordered pairs are (2, 6), (-10, 10), (-4, -4), and (-6, -8).

Vocabulary function input output Insert Lesson Title Here Course Functions, Tables, and Graphs

Rube Goldberg, a famous cartoonist, invented machines that perform ordinary tasks in extraordinary ways. Each machine operates according to a rule, or a set of steps, to produce a particular output. In mathematics, a function operates according to a rule to produce exactly one output value for each input value. The input is the value substituted into the function. The output is the value that results from the substitution of a given input into the function. Course Functions, Tables, and Graphs

Rule Output Input You can use a table to organize and display the input and output values of a function. Course Functions, Tables, and Graphs A function can be represented as a rule written in words, such as “double the number and add nine to the result,” or by an equation with two variables. One variable represents the input, and the other represents the output.

Additional Example 1A: Completing a Function Table Find the output for each input. Input y = 8x + 5 Rule Output x 8x + 5 y –4 –2 1 8(–4) + 5 8(–2) + 5 8(1) + 5 –27 –11 13 Course Functions, Tables, and Graphs

Additional Example 1B: Completing a Function Table Find the output for each input. Input y = 4x 2 Rule Output x 4x24x2 y – (–3) 2 4(0) 2 4(4) Course Functions, Tables, and Graphs

Check It Out: Example 1A Find the output for each input. Input y = 5x + 3 Rule Output x 5x + 3 y –6 –3 3 5(–6) + 3 5(–3) + 3 5(3) + 3 –27 –12 18 Course Functions, Tables, and Graphs

Check It Out: Example 1B Find the output for each input. Input y = 3x 2 Rule Output x 3x23x2 y – (–2) 2 3(0) 2 3(5) Course Functions, Tables, and Graphs

An ordered pair is a pair of numbers that represents a point on a graph. Remember! You can also use a graph to represent a function. The corresponding input and output values together form unique ordered pairs. Course Functions, Tables, and Graphs

When writing an ordered pair, write the input value first and then the output value. Helpful Hint Course Functions, Tables, and Graphs

Make a function table for x = -2, -1, 0, 1, and 2, and graph the resulting ordered pairs. Additional Example 2A: Graphing Functions with Ordered Pairs x y RuleInput Output Ordered Pair 3(–2) – 4 x 3x – 4 y (–2, –10) 2 4 –2 – (–1) – 4 3(0) – 4 3(1) – 4 3(2) – 4 –10 –7 –4 –1 2 (–1, –7) (0, –4) (1, –1) (2, 2) (x, y) 2 4 –2 –4 –10 –6 –8 –4 y = 3x – 4 (–2, –10) (–1, –7) (0, –4) (1, –1) (2, 2) Course Functions, Tables, and Graphs

Additional Example 2B: Graphing Functions with Ordered Pairs y = 5x 2 Make a function table for x = -2, -1, 0, 1, and 2, and graph the resulting ordered pairs. RuleInput Output Ordered Pair 5(–2) 2 x 5x25x2 y (–2, 20)–2 – (–1) 2 5(0) 2 5(1) 2 5(2) (–1, 5) (0, 0) (1, 5) (2, 20) (x, y) x – O 4 –4 (0,0) (–1, 5)(1, 5) (2, 20) y (–2, 20) Course Functions, Tables, and Graphs

Make a function table for x = -2, -1, 0, 1, and 2, and graph the resulting ordered pairs. x y RuleInput Output Ordered Pair 2(–2) – 3 x 2x – 3 y (–2, –7) 2 4 –2 – (–1) – 3 2(0) – 3 2(1) – 3 2(2) – 3 –7 –5 –3 –1 1 (–1, –5) (0, –3) (1, –1) (2, 1) (x, y) 2 4 –2 –4 –10 –6 –8 –4 y = 2x – 3 (–2, –7) (–1, –5) (0, –3) (1, –1) (2, 1) Check It Out: Example 2A Course Functions, Tables, and Graphs

y = 6x 2 Make a function table for x = -2, -1, 0, 1, and 2, and graph the resulting ordered pairs. Rule Input Output Ordered Pair 6(–2) 2 x 6x26x2 y (–2, 24)–2 – (–1) 2 6(0) 2 6(1) 2 6(2) (–1, 6) (0, 0) (1, 6) (2, 24) (x, y) x – O 4 –4 (0,0) (–1, 6)(1, 6) (2, 24) y (–2, 24) Check It Out: Example 2B Course Functions, Tables, and Graphs

1. Find the output for each input value. Insert Lesson Title Here Input RuleOutput 4x – 1yx –2 0 4 –9 –1 15 Course Functions, Tables, and Graphs 4(-2) – 1 4(0) – 1 4(4) – 1

2. Make a function table with three input values for y = x 2 – 1, and graph the resulting ordered pairs. Insert Lesson Title Here Possible answer: x y –2 2 2 –4 4 4 (–2, 3) (2, 3) (0, –1) Course Functions, Tables, and Graphs InputRuleOutputOrdered Pair x 2 – 1 y x – – – 1 –2 2 – – 1 (x, y) (-2, 3) (0, –1) (2, 3)