Supose you have a linear transformationf: ℝ → ℝ, wheref(3) = 9 andf(5) = 15.
1. use the adition property to computef(8) andf(13).
2. findf(12) andf(10). show your work.
3. findf(−3) andf(−5). show your work.
4. findf(0). show your work.
find a formula forf(x).
6. draw the graph of the function y =f(x).

Lets take

f(x) = a x +b

x= 3  ,f(3)=9

9 = 3 a + b                 ------------1

x=5   ,f(5) = 15

15 = 5 a + b                   ---------2

From equation 1 and 2

6 = -2 a

a = - 3

9 = 3 (-3)+ b  

b= 18

f(x) = -3 x + 18

f(8) = -3 x 8  + 18=-24 + 18 = -6

f(13) = -3 x 13+ 18 = - 39 + 18 =-11

f(12) = -3 x 12+ 18 = - 36 + 18 = -18

f(10) = -3 x 10 + 18 = -12

f(-3) = -3 x (-3)+ 18 =27

f(-5) = -3 x (-5)+ 18 = 33

f(0) = -3 x 0+ 18 = 18

paula, cory, and krista

step-by-step explanation:

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