advertisement

Sewanhaka High School Math 8 Per:________________ Name:________________________________ Mrs. Lidowsky, Principal Mr. Long, Teacher Date:_____________________ H.W. #33: Ditto DO-NOW #33: Answer the following questions: 1) Write the rule for the following function: The second number is six less than twice the first number. What pairs of numbers am I thinking of. Graph the previous function using a table of values. Input ( ) [Domain] Rule: Output (f( [Range] )) 2) Andrew can walk 4 miles in 20 minutes. How long will it take (in minutes) him to walk 6 miles? Topic: Functions Main Idea: Vertical Line Test Aim: RECALL List the ordered pairs where the second number (y) is 1 more than the first number (x) Write the equation in terms of y. Graph the line. Is this relation a function? NOTES Represent the relation as a graph. Then tell whether the relation is a function. Explain your reasoning. (-1, 1), (2, 0), (3, 1), (3, 2), (4, 5) Drill: Represent each relation as a graph. Then tell whether the relation is a function. Explain your reasoning. 1) (0, 3), (1, 2), (2, -1), (4, 4), (5, 4) 2) (-2, -1), (0, 2), (2, 3), (-2, -4) f(x) Summary: (3) The graph at the left represents f(x). Find the following values: (a) f(-4) = _____ (b) f(-2) = ______ (c) f(0) = _____ (d) f(1) = ______ (e) f(2) = _______ (f) f(4) = _____ (g) Is f(x) a function. Explain your answer.