1allr - Ch7 word formulas

• Wiskunde
• Middelbare school
• vwo
• Leerjaar 1

Make a formula (next slide)

The entry to a disco is €5. You have to pay €3 per drink.

Make a formula to calculate the total cost in euros when you know the number of drinks.

The entry to a disco is €5. You have to pay €3 per drink. Make a formula.

Height = 30 - 2 x number
Calculate the height when the number is 8.

What is the starting value in the following formula:
h = 2 x n + 40

1. 2
2. 40
3. -2
4. -40

Which formula passes through the origin?

1. h = 30 - 2 x a
2. h = -3 x a + 10
3. h = 5 x a - 20
4. h = 2 x a

What is the starting value?

What do you have to pay per minute?

10/20 = €0.50 per minute!

What do you have to pay per minute?

Make a formula. Use w & t

w = 20 x t

Make a formula. Use b and a

b = 6 + 3 x a

Make a formula. Use b and g

b = 20 + 1.5 x g

l = 90 - 4.5 x t

Make a formula. Use l and t

Make a formula. Use h and t

h = 30 - 2 x t

(8, 280)

What are the coordinates of the intersection point?

h = 90 - 2 x t

The graph is...

1. rising
2. falling
3. constant

p = 4 x a - 30

The graph is...

1. falling
2. rising
3. constant

h = 30

The graph is...

1. falling
2. rising
3. constant

h = 10 x a

The graph is...

1. falling
2. rising
3. constant