Write a rule for the linear function in the table.

x f(x)
1 –7
2 –10
3 –13
4 –16
-------------------------
a. f(x)=-1/3x-4
b. f(x)=3x+4
c. f(x)=-3x-4
d. f(x)=x-7

Question

Write a rule for the linear function in the table.
 

x   f(x)
1   –7
2  –10
3  –13
4  –16
-------------------------
a. f(x)=-1/3x-4
b. f(x)=3x+4
c. f(x)=-3x-4
d. f(x)=x-7

geerky42 · Answer

Well, to create linear function, you are going to need slope and y-intercept, right?

anonymous · Answer

yes..

geerky42 · Answer

So your goal is to track slope and y-intercept.

geerky42 · Answer

y-intercept is value of y when x=0

anonymous · Answer

Okay

anonymous · Answer

I still have no idea what to do..

geerky42 · Answer

Look at table. For each time x value increase by 1, how much do y-value increase or decrease?

anonymous · Answer

It increases by 3

geerky42 · Answer

Close. decrease by 3.

Or you can say increase by -3.

geerky42 · Answer

So use this fact, what is y when x=0?

geerky42 · Answer

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anonymous · Answer

-4..I think.

geerky42 · Answer

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