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Vocabulary . Variables and Patterns. Review Coordinate Graphs. Plot (6, -2). Plot (-8, 2). Plot (-2, 0) and (0, -2). What are the coordinate pairs/ordered pairs for this shape?. What are the coordinate pairs/ordered pairs for this shape?. Coordinate Graphs. Basic Terms.

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vocabulary

Vocabulary

Variables and Patterns

basic terms
Basic Terms
  • Variable: A quantity (something that can be measured) that can change.
    • Ex. Weight is a variable because the weight of something can change. Time is a variable because it can be measured and it changes.
  • Name five things in your life that are variables.
basic terms cont
Basic Terms (cont.)
  • Relationship: The connection between two or more variables. There are three types of relationships:
    • Positive—as one variable increases, the other variable increases (and vice versa)
      • The more hours Shay practices basketball, the more points she scores in her games.
    • Negative—as one variable increases, the other variable decreases (and vice versa)
      • Ex. The more hours you spend watching tv, the less amount of sleep you get each night.
    • No Relationship—as one variable increases, the other variable stays the same
      • No matter what time grandma goes to the movies, she pays the same amount to purchase a ticket.
basic terms cont1
Basic Terms (cont.)
  • Table: A way to organize two or more variables that are related. A table can help show you see constant changes and make predicts about the variables.
basic terms cont2
Basic Terms (cont.)
  • Pattern: A change that happens in a constant/consistent/predictable way.
    • Ex. #1 Can you predict what the next shape should be?
    • Ex. #2 Can you predict what the next number show be?

2, 5, 8, 11, ____

?

review of 3 3
Review of 3.3
  • What is an expense/cost?
    • The amount a person spends on supplies, materials, etc.
  • What is income?
    • The amount paid by the customer
  • What is profit?
    • The difference (subtraction) between the income and expense/cost. The extra money you have after paying all of your expenses.

Income – Expense/Cost = Profit

review of 3 3 cont
Review of 3.3 (cont.)
  • You need to figure out what the income and expense/cost is for one item in order to determine the profit.
    • Example: Ten candy bars are sold for $6.50. Each candy bar costs $0.45 to make. How much profit is made after selling the 10 candy bars?
      • Answer:
        • 6.50 divided by 10 = 0.65
        • 0.65(income) – 0.45(cost) = 0.20(profit)
        • 0.20(profit for 1) x 10(# sold) = $2.00 (total profit)
investigation 3 4 cont
Investigation 3.4 (cont.)
  • Complete page 41,

Problem 3.4: A, B, C, & D

    • Work on Problem A by yourself
    • For B, C, & D, work with your group to complete