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Photo

For the print of posters an online-company calculates 13.50 € for three poster. Calculate the costs of ten posters.

# Proportionality

Modeling

Calculate gradient

Calculate the gradient of the function given by the picture.

# Proportionality

Training

Gradient m>0

Cross all correct statements of a proportional function.

# Direct proportionality & rule of three

Reasoning

Proportional graph

Select the graph of a proportional function.

# Direct proportionality & rule of three

Reasoning

The Bridge

One can describe the railway bridge as quadratic function $f(x)=ax^2+bx+c$. Calculate the value of the factor $a$ in the term of the quadratic function. Note: One meter is equal to one unit of length. Round to two decimal numbers.

# Quadratic functions

Modeling

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