Question

Write a rule for the linear function in the table.
x f(x)
1 3
2 2
3 1
4 0



A. f(x) = 4x


B. f(x) = x – 4


C. f(x) = x + 4


D. f(x) = 4 – x

Answer 1

Same procedure as the last one. Find the equation of the line that fits the points in the table.

Answer 2

im not cheating im just tring to gewt it right this time i took the test 1 time befor and made 45

Answer 3

Best way to do well on a test is to understand the material :-) Show me your work, and I'll correct you if you do it wrong.

Answer 4

ok

Answer 5

So, pick a pair of points, and find the slope...

Answer 6

is it c

Answer 7

No. You're guessing. No need to guess, you can figure this out.

If you make a sketch of the data in the table, does the line slope up, down, or is it horizontal? We know it can't be vertical, because the definition of a function is that there is a unique y value for each value of x.

Answer 8

And I have to say you didn't do a very good job of guessing! if you chose c, that was f(x) = x + 4, but the first value in the table is x = 1, f(x) = 3. Does that match with f(x) = x + 4?

Answer 9

If you're going to guess to get an answer (a reasonable tactic in some cases), if at all possible you should check the result to make sure it works!

Answer 10

ok

Answer 11

it is ether a or d

Answer 12

It can only be one of them.

a) is f(x) = 4x. Check your points. First point in the table is x = 1, f(x) =3. Does 1*4 = 3?

Answer 13

i think its a

Answer 14

If you think it is a), you're in for a lot of unhappiness in your future. 4*1 does not equal 3. 4*2 does not equal 2. 4*3 does not equal 1. 4*4 does not equal 0.