y=3x+2 make input/output table for the function using domain of -2,-1,0,1,2

Question

i need to make an input/output table for this function using a domain of -2,-1,0,1,2

 

Answer 1

Sarah,

 

an input/output table is a table listing the domain (or x values) to use in the formula.  Each x gives you an answer for y.  Then you simply place those values for y in the table.  IT starts like this:

 

 

 x    y

 

-2

-1

 0

 1

 2

 

now solve the equation for each y and place those in the table.

 

y = 3x + 2,  so for x= -2 you get y = 3*(-2) + 2 = -6 + 2 = -4   Now the table is starting to fill in:

 

 x    y
-2   -4

-1

 0

 1

 2

 

continue with x = -1, so y = 3*(-1) + 2 = -3 + 2 = -1

 

 x    y
-2    -4

-1    -1

 0

 1

 2

 

ok, you try it.  keep going until you use all the values for x.  You can even try some other values for x and predict what they might be by looking at the trend on the table.

 

good luck!,  kim