Åk 6–9
 
English/Polski
3.5 Exercises – Functions as Patterns
1. From Patterns to Functions
  Which function describes the following changes in the number of stars?
 
   
 
 
2. Formulas
  A meter of cloth costs 100 kr. Which formula indicates the price for a certain number of meters?

a)   y = 100 + x
b)   y = 100 ÷ x
c)   y = 100
x

 
 
 
 
3. Formulas
 

The price to take a taxi week days between 06:00 and 19:00 is:
base fare 40 kr plus a fare of 14.50 kr/km.

Which formula indicates the taxi fare?

a)   y = 40 + 14.5x
b)   y = 40x + 14.5
c)   y = 40x + 14.5x

 
 
 
 
4. Value Tables
 

Indicate the function (which depends on x) with a formula.

a)
 
b)
 
c)
 
 
 
5. Functions and Graphs
 
  Pair together the function with the correct graph.
a) y = x + 2
b) y = x - 5
c) y = 2x + 3