function rules

d

New member
Joined
Jan 20, 2006
Messages
8
write the function for each set of cards:Example of others Input/Output

rule being multiply by5 then subtract by 1 / rule being multiply by 2 then minus 10
1======4 1x5-1=4 5=======0 5x2-10
2======9 2x5-1=9 6=======2 6x2-10
3======14 3x5-1=14 7=======4 7x2-10
4======19 4x5-1=19 8=======6 8x2-10

NOW this one....
1========3
2========6
3========11
4========18
 

emmaiskool242

Junior Member
Joined
Mar 29, 2006
Messages
66
Ok I would like to help you but I'm a little lost on what you are trying to say, could you show me some of your work and/or try explaining your problem in a different way??
 

jolly

Junior Member
Joined
Apr 18, 2004
Messages
124
emmaiskool242 said:
Ok I would like to help you but I'm a little lost on what you are trying to say, could you show me some of your work and/or try explaining your problem in a different way??
That makes two of us. :wink:
 

emmaiskool242

Junior Member
Joined
Mar 29, 2006
Messages
66
jolly-no kidding :D
 

soroban

Elite Member
Joined
Jan 28, 2005
Messages
5,588
Hello, d!

I think I know what's going on . . .

Write the function for each set of cards:
Example of another

Code:
  Input    Output     Rule: "times 5, minus 1"

    1         4          1 x 5 - 1  =  4 
    2         9          2 x 5 - 1  =  9
    3        14          3 x 5 - 1  = 14
    4        19          4 x 5 - 1  = 19
The function is: \(\displaystyle \,f(x)\:=\:5x\,-\,1\)


Now determine the "rule" for this set:
Code:
  Input     Output
    1          3
    2          6
    3         11
    4         18
The function seems to be: \(\displaystyle \.f(x)\:=\:x^2\,+\,2\)
 
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