Parabolas (t1b)

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Parabolas

February 15th 2022

t1b

12:05

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Schedule

• Announcements                                            5 min
• Review: quadratic formulas                    15 min
• Parabolas                                                         10 min
    Quizzes
• Practice                                                           30 min

Announcements

• Test:
    Monday, March 13th
• About:
    Ch.5  &  ch.6

What happens when I fill in
x = 4 or x = -4
into a quadratic formula like...

y=​2​​1​​x​2​​−4

1. The answers are different
2. The answers are the same
3. It depends on the formula
4. It's impossible to tell

Complete the table in your notebook.

Copy and complete the table in your notebook.

1. The blue graph fits the table
2. The red graph fits the table
3. The orange graph fits the table
4. The green graph fits the table

How to draw a graph from a quadratic formula

Given is the formula

Draw the graph.

Step 1: MAKE A TABLE

Step 2: DRAW A COORDINATE SYSTEM

Step 3: PLOT THE POINTS FROM YOUR TABLE

Step 4: DRAW A SMOOTH CURVE 

                THROUGH THE POINTS

y=​2​​1​​x​2​​−2

Step 1

Step 2

Step 3

Step 4

How to draw a graph

Plot the points

Draw a curve

Make a table

Draw a coordinate system

Practice

f

Green: basic route

Red: advanced route