# 1TTO §7.3 Linear formulas (part 1)

§7.3 Linear formulas

In this Lessonup
+    linear graphs and
+    linear formulas are dealt with
+    following it will make doing §7.3 easier
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Slide 1: Tekstslide
WiskundeMiddelbare schoolhavo, vwoLeerjaar 1

In deze les zitten 16 slides, met interactieve quizzen en tekstslides.

Lesduur is: 50 min

## Onderdelen in deze les

§7.3 Linear formulas

In this Lessonup
+    linear graphs and
+    linear formulas are dealt with
+    following it will make doing §7.3 easier

#### Slide 1 -Tekstslide

Given formula:
time in hours x 5 euros + 20 = salary,
The graph for this formula

#### Slide 2 -Tekstslide

number of visits x 3 + 6 = amount
Statement 1:
The graph for this formula is a straight line.

#### Slide 3 -Tekstslide

St. 1: The graph is a straight line.
A
true
B
false

#### Slide 4 -Quizvraag

8
It is a straight line indeed,
as you see alongside.

#### Slide 5 -Tekstslide

number of visits x 3 + 6 = amount
Statement 2:
The roles that is played by the numbers 3 and 6 are about the same.

#### Slide 6 -Tekstslide

St. 2: The roles are the same.
(Explanation next slide.)
A
true
B
false

#### Slide 7 -Quizvraag

Above
Above you clearly see that 6 and 3 play a completely different
role in the graph!

#### Slide 8 -Tekstslide

Important: (Remember!!!)
+   when a graph is a straight line it is called a LINEAR GRAPH
+   the formula of a linear graph is called a LINEAR FORMULA

#### Slide 9 -Tekstslide

Statement 3:
The graph that corresponds to this formula is a straight line.

#### Slide 10 -Tekstslide

St. 3: The graph is a straight line.
(Explanation follows.)
A
false
B
true

#### Slide 11 -Quizvraag

Above you see that the graph is certainly no straight line.
By the way, this was from exercise 15, so from the previous paragraph.
time x time + 1 = height
If you got this wrong, study §7.2 once more!

#### Slide 12 -Tekstslide

Homework time
Do  of §7.3 now: ex 17, 19 and 20
1. make  2. correct it well

Questions?

#### Slide 15 -Tekstslide

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