     #### Ordinate of a linear function

The linear function is: $y =-\frac{2}{3} x + b$ For which ordinate $b$ does the point $A(6,-1)$ belong to the linear function?
# Linear functions
# Linear equations

Training
8      #### Hot-air balloon

At the beginning of a journey, a hot air balloon increase with 2 m per second. Calculate, how many meter the balloon goes up in the first minute.

# Unassigned

Modeling
7      #### Gradient of a street

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
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