## All Tasks

#### Route (Beginner-Modelling)

Joana goes from home to school for a part of the route on foot, another part by bicycle and a third part by bus. If the graph represents the route from home to school, how did she make the route?

# Functions & characteristics

Modeling

9

#### Graph (Intermediate-Learning)

The figure shows the graphs of 4 functions, match each function with its graph.

# Linear functions

Learning

9

#### value (Beginner-Exercising)

Consider the function f defined by $f(x) = -5x -1$.
Find the value of $x$ whose image is $−8$.
(Present the result with one decimal place)

# Linear functions

Training

9

#### Intersection

Given two linear functions $y_1 = \frac{x}{2} + 2$ and $y_2=-x+5$. Can you find their point of intersection?

# Linear functions

Training

8

#### Positions of two graphs

The graphs of the two linear functions $y_1 = \frac{6}{8} x +1.1$ $y_2= \frac{3}{4}x - 1$ are ....
[Select the right answer below.]

# Linear functions

Training

8

#### How many seconds? (E_M)

Of all winged predators, the peregrine falcon is the most remarkable in its combination of beauty and flight ability. Knowing that the peregrine falcon is 1500 m high (A) and that when descending, it loses 60 m high every second, how many seconds does it take to catch a rock pigeon that is 30 m above the ground?

# Linear functions

Modeling

9