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#### Mathematics 2 ESO – Unit 9 FUNCTIONS Page 97 – Activity 53

1 –  Watch the video on “Domain and range of a relation ” and answer:

• a) What is the domain?
• b) What is the range?

2 –  For the function f(x) = x + 1

(Note: “f(x)” is how we call the variable “y” when we are speaking about functions).

• a) Fill the table of values:
 x f(x) 0 1
• b) Draw the function.

3 – Draw these functions:

• a) y = –3
• b) y = 2x – 1
• c) y = x
• d) 6y = x
• e) 2y = x + 1
• f) 4y = (x/2) + 1

4 – Draw the following functions:

• a) The slope is 2 and the y-intercept is y = 3
• b) The slope is –3 and the y-intercept is y = –

5 – Draw the following functions:

• a) The slope is −4 and passes through point (1,1)
• b) The slope is 3 and passes through point (–1,–4)

6 –  Four kilograms of rice cost 3.2 €

• a) Write the function for the cost per kilogram of rice.
• b) Draw the function.

7 –  At the age of 12, a student is 1437 mm tall. At the age of 18 the same student is 1728 mm tall.

Draw the function (remember that the growth is constant).