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Chapter 3 Section 1 Reading graphs Plotting points Estimating Values Warm-up Solve the following: Give set-builder, interval, and number line Graphs A graph is a picture representation of A function OR A set of data Graphs come in many styles Bar graph Pie chart line graph

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chapter 3 section 1

Chapter 3 Section 1

Reading graphs

Plotting points

Estimating Values

warm up
Warm-up
  • Solve the following:

Give set-builder, interval, and number line

graphs
Graphs
  • A graph is a picture representation of
    • A function OR
    • A set of data
  • Graphs come in many styles
    • Bar graph
    • Pie chart
    • line graph
questions
Questions
  • How many drinks would a 200lb person have to drink in 1hr to have a 0.08% BAC?
  • If Steve has a BAC less than 0.08% after drinking 4.5 drinks in 1hr, what can we say about his weight?
  • Tina has a BAC of 0.10% after just 3 drinks. What can we say about her weight?
pie chart questions
Pie Chart - Questions
  • Roughly how much more popular is apple pie than peach pie?
  • Name two types of pie that are roughly equally popular.
  • In both cases, use the chart to identify the answers, not the percentage numbers
coordinates
Coordinates
  • Bars and pies are nice for categorical data, but Cartesian coordinates are often far more useful
    • line graphs
    • equations (sect 3.2)
  • Devised by Rene Descartes
    • use two perpendicular number lines
      • X and Y axes
    • each point is given by two numbers (x,y)
make a graph
Make a graph
  • Draw a set of coordinates and mark off the following points:
  • (8,7)
  • (3,-5)
  • (-7,-5)
  • (4,6)
  • (2,0)
  • (0,0)
  • (-3,2)
some names
Some Names
  • Origin: the point (0,0)
  • Axis: the number lines
  • Abscissa: the x-axis value of a point
  • Ordinate: the y-axis value of a point
  • Quadrant: each quarter of the graph cut off by the axes
  • Ordered pair: the two values for a point, in (x,y) order
battleship
Battleship
  • Collaborative Corner, page 174
  • Groups of 2
  • 10 yes/no questions to find the battleship!
  • Play 2 rounds; everyone gets to play each part against each other person
  • If an extra person is in your group, they can double-check
questions14
Questions
  • How long does it take to get to a heart rate of 80BPM?
  • After how many months is this person’s resting heart rate at a minimum?
  • What is that minimum heart rate?
question
Question
  • What might have happened after month 7?
the window page 167
The Window (page 167)
  • Text book convention: [Left, Right, Bottom, Top]
  • So, [-10, 10, -5, 20] looks like what?
  • Let’s set the WINDOW on our calculator
your turn
Your Turn
  • Page 171, Problem 26. Let’s try doing it with the calculator.
  • TI Calculator Help