Show:
+, -, x, -
Sequences
Equations
Functions
Linear or Exponential?
100

7(-6) = ?

-42

100

38, 42, 46, 50, ?

54

100

35 + x = 52     x = ?

x = 17

100

f(x) = 2x + 10

f(6) =  ?

f(x) = 2x + 10

f(6) = 2(6) + 10

       = 12 + 10

        = 22

100

Linear or Exponential?  Why?

25, 30, 35, 40, ...

Linear  

Add 5   (mas 5)

200

-12 + 8 = ?

-4

200

-2, -5, -8, -11, ?

-14

200

3x + 5 = 26     x = ?

3x + 5 = 26

   3x   =  21

    x = 7

200

f(x) = 9x - 4

f(3) =  ?

f(x) = 9x - 4

f(3) = 9(3) - 4

       = 27  - 4

       =  23

200

Linear or Exponential?  Why?

80, 40, 20, 10, ...

Exponential

divide by 2  (dividir 2)

300

- 6 - 16 = ?

- 22

300

1, 3, 9, 27, ?

81

300

4x - 8 = 16     x = ?

4x - 8 = 16

     4x = 24

       x = 6


300

f(x) = x2

f(7) = ?

f(x) = x2

f(7) = (7)2

       = 7*7

       = 49

300

Linear or Exponential?  Why?

f(x) =  2  + 5x 

Linear 

+ 5 every x

(mas 5 cada x)

400

-30/5 = ?

-6

400

2, 8, 32, 128, ?

512

400

3x + 2x + x = 30     x = ?

3x + 2x + x = 30

              6x = 30

                x = 5

400

f(x) = x2 + 25

f(3) =  ?

f(x) = x2 + 25

f(3) = (3)2 + 25

       = 9 + 25

       =  33

400

Linear or Exponential?  Why?

f(x) = 400(3)x

Exponential

multiply by 3

(por 3)

500

32(7) = ?

No Diablo!!

224

500

600, 300, 150, 75, ?

37.5

500

-3x + 5x = 1000     x = ?

-3x + 5x = 1000

         2x  = 1000

            x = 500

500

f(x) = 5x + 5

f(x) = 15     x = ?

f(x) = 5x + 5

f(x) = 15     

15  =  5x + 5

10  =  5x

2  =  x

500

Linear or Exponential?  Why?

Every day, Evelyn has 2 new friends.

(Cada dia, Evelyn tiene dos amigas nuevas)

Linear

+ 2 new friends every day

(mas 2 amigas nuevas cada dia)