All Tasks
Gradient and term
Cross the right statements for the function y = mx with the gradient m.
# Proportionality
Reasoning
8
Graph_parallel_perpendicular (Intermediate-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 lines $u$ and $v$ are parallel. **________**
- Line $s$ is perpendicular to line $v$. **________**
# Linear functions
Training
9
Race (Intermediate-Modelling )
Three friends decided to take a run. Ana used a bicycle, Filipa and Joana used cars. Joana's car is faster than Filipa's.
Each function of the figure corresponds to the race of each of the friends.
The expression $g(5)=125$ means that:
# Linear functions
Modeling
9
Devaluation of a product (E_M)
Due to wear, the value (V) of a product decrease with time (t). We can then consider the devaluation of a product as a linear function. Knowing that the value of a machine today is 1000 euros, and estimating that in 5 years it will be 250 euros, what will its total devaluation be after 6 years?
# Linear functions
Modeling
9
Positive and negative slopes
Can you identify which slopes are positive and which are negative?
Select all and only those graphs that have positive slopes.
# Linear functions
Training
8
From table to law
If x and y of the table are proportional, find the law of a proportional function that fits to the data given in the table.
# Proportionality
Training
8