Question

Let f(x) be a linear function. Choose the best description for the function 3f(x) - 3.

A. f(x) stretched by a factor of 3 and shifted down 3 units
B. Not a transformation of f(x)
C. f(x) stretched by a factor of 3 and shifted up 3 units
D. f(x) shifted down 3 units

Answer 1

ok sorry about that was afk for a bit. so you have some linear function defined as f(x), right? And now we're being asked to describe a new function thats kind of modifying the first function, right? It's being multiplied by 3, and then being subtracted by 3, right?

Answer 2

yes

Answer 3

What happens then if its being multiplied by 3? For example is f(x) is oh, 3x right? Then 3(3x) = 9x. So whats the difference between 3x and 9x?

Answer 4

Its being _____?

Answer 5

6?

Answer 6

Well not exactly we're looking for the geometrical difference. It's being multiplied, so that means it's growing bigger or wider, right? Look back in your answers. It is being _____?

Answer 7

stretched

Answer 8

by a factor of 3

Answer 9

and shifted up by 3?

Answer 10

well, up would be positive, wouldnt it?

Answer 11

we have -3 ^_^

Answer 12

so down

Answer 13

sorry im so tired i cant really think atm

Answer 14

yeah down =)

Answer 15

so a?

Answer 16

yep

Answer 17

thank you