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After this lesson :

NASK - GRAPHS. Les 5 / 10. After this lesson : You will be able to explain why a scale has to have steps in multiples of 1, 2 or 5 You will be able to produce a suitable scale You will be able to produce a graph on the basis of a table with measurements. NASK - GRAPHS.

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After this lesson :

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  1. NASK - GRAPHS Les 5 / 10 Afterthislesson: Youwillbeabletoexplainwhy a scale has to have steps in multiples of 1, 2 or 5 Youwillbeabletoproduce a suitablescale Youwillbeabletoproduce a graph on the basis of a tablewithmeasurements

  2. NASK - GRAPHS Les 5 / 10 Whygraphs? You make a graph in order to have anoverview of a ‘large’ number of measurements, this in order: 1) To have anoverview of the progress of the measurement (the process). 2) Torecognise a relationshipbetweenquantities.

  3. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 1Prepareforthisby making a table of yourmeasurements. Take a piece of graph paper (or draw yourown piece withblocks).

  4. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 2 Draw the horizontalandverticalaxis.

  5. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 3Put the right quantityand unit on the axes. Horizontal= givenVertical= cause / measurement (y “een eitje valt”) ---> mass in kg ---> Length in cm

  6. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 4Choose step size (1, 2, 5, 10). 70 ---> mass in kg 60 50 40 30 20 10 0 20 40 60 80 100 120 140 160 180 ---> Length in cm

  7. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 5Putting points in the graph 70 ---> mass (kg) 60 50 40 30 20 10 0 20 40 60 80 100 120 140 160 180 ---> Length(cm)

  8. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 6Draw a smooth line through as many points as possible. Youdon’tneedtoinclude points thatdon’tseemtobelong in the graph. 70 ---> mass (kg) 60 50 40 30 20 10 0 20 40 60 80 100 120 140 160 180 ---> Length(cm)

  9. NASK - GRAPHS Les 5 / 10 How do you make a graph? Step 7Put a titleabove the graphtoindicatewhat is in it. TARGET WEIGHT OF BOYS 70 ---> mass (kg) 60 50 40 30 20 10 0 20 40 60 80 100 120 140 160 180 ---> Length(cm)

  10. NASK - GRAPHS Les 5 / 10 Step by step plan for making a graph Step1: Make a tablefrom the measurementresultsor the formula. • Data in top row (X axis) • Measurement or calculation in bottomrow (Y axis) Step 2: • Draw the horizontalaxis(X axis) andverticalaxis (Yaxis)(think of “Een eitje valt”) • Step 3: • Placealongside the axwhatit is about istextsfrom the table: quantity (subject) and • Unit (size). Example: distancein m or sumin €

  11. NASK - GRAPHS Les 5 / 10 • Step 4: • Decide on the step sizefrom the table • How do youdetermine the step: • Take a minimum and maximum valueforx . • Dividexby the number of boxesthatyoucan draw on the axis • Choose a valuefrom the row below that is equalto or greater(good step size: 1, 2, 5 or a multiple of 10) • Do the samefor the yvalue. • Step 5: • Put the measurement points in the co-ordinate system. Step 6: • Draw a line. Usea geometrictriangleifall the point/crosses are in a straight line. Otherwise make a smooth line. • Step 7: • Title

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