The picture shows a traffic sign. This give the gradient of a street in percentage. Give the term of a proportional function with the same decreasing. Write the gradient as a decimal number.

# Unassigned

Modeling
8

#### Chocolate bar

To compare prices of products, supermarkets must give the price of 100g or 1 kg of a product. The chocolate bar in the picture has a weight of 125 g and it costs 0.85 €. Calculate the costs of 100 g.

# Unassigned

Modeling
7

#### Line equation

What is the equation of the line passing through the points $P=(1, -5)$ and $Q=(3, 3)$?

# Linear functions

Training
8

#### Slope + point (B_E)

Cross the law of the linear function whose graph passes through the point $(2, 1)$ and has a slope of $3$?

# Linear functions

Training
8

#### Holiday

Family Miller makes a holiday. They pay 34.20 € at a fuel station for 18 l of fuel. Calculate the price for 54 l of fuel.

# Unassigned

Modeling
7

#### From law to graph

The law of the proportional function is f(x) = - 0.75x. Cross which graph represents to this law.

# Unassigned

Training
8