Finding how to make a function table

[mykidsmathgrd4]

I haven't done this in 30+ yrs. My 4th grader has to graph an equation.
The function table reads as follows:
Equation y=x + 3
Function table- x- 1,2,3,4,5 what would be y
How do I find the value?
Also, if y= 6-x...how does that work. I need to understand in order to explain to her.
Thanks!
Frustrated and Old Mom

 

[Mrspi]

I haven't done this in 30+ yrs. My 4th grader has to graph an equation.
The function table reads as follows:
Equation y=x + 3
Function table- x- 1,2,3,4,5 what would be y
How do I find the value?
Also, if y= 6-x...how does that work. I need to understand in order to explain to her.
Thanks!
Frustrated and Old Mom

You may be trying to make this more difficult than it is.

You are given an equation (rule):
y = x + 3

You are given some values to use for x, and are expected to complete the "table" to show what value of y goes with each value of x.

If x = 1 (the first x-value in the table), you'd find the "y" which goes with it by using 1 for x in the equation (rule):

y = x + 3
If x = 1, then
y = 1 + 3
y = 4

If x = 2, then
y = 2 + 3
y = 5

See how it goes? You've already found two of the missing values in the table.

If the "rule" is y = 6- x, you'd use the same procedure. When x = 1, then
y = 6 - x
y = 6 - 1
y = 5

There you go...one row in the table filled in.

If you're still having trouble understanding this, please repost and indicate where your difficulty lies.

 

[mykidsmathgrd4]

Thanks. I was making more difficult. I guess I did actually know the answer but needed to validate to make sure I was doing it correctly. I appreciate the help!Whew.