## All Tasks

#### 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

#### Graph_TF (Beginner-Exercising)

The lines r, s, t, u, v are represented in the figure.
State whether the following statements are true (T) or false (F).
- The slope of the line t is 4. **________**
- The y-intercept of the line v is -2 **________**
- The line r is the graph of a linear function with $y=-x$. **________**

# Linear functions

Training

9

#### Intersection point (B_E)

The intersection point of the functions analytically defined by $y -3x +5 = 0$ and $y = -x +3$ is

# Linear functions

Training

9

#### Graph_point (Expert-Exercising)

The lines $r$, $s$, $t$, $u$, $v$ are represented in the figure.
The lines $r$ and $s$ are concurrent and intersect at a point $P$. The coordinates of this point are:

# Linear functions

Training

9

#### Graph_Law (Intermediate-Exercising)

The lines $r, s, t, u, v$ are represented in the figure.
The analytic expression of a function whose graph is a line parallel to line $s$ and which passes through the point $(2,0)$ is, in decimal format:
y=**_____**x+(**_____**)

# Linear functions

Training

9