SOLUTION: If f(x)=a+bx, what is f(x+k)-f(x)?

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Question 1065853: If f(x)=a+bx,
what is f(x+k)-f(x)?
Found 2 solutions by math_helper, rothauserc:
Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
If f(x)=a+bx,
what is f(x+k)-f(x)?
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f(x+k) = a+b(x+k)

       = a+bx+bk

f(x)   = a+bx             (<<< subtract this from line above)

—————————————————————

f(x+k)-f(x) = bk

—

Ans:  +highlight%28f%28x%2Bk%29-f%28x%29+=+bk%29+

Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
f(x+k) = a +b(x+k) = a +bx +bk
:
f(x+k)-f(x) = a +bx +bk -a -bx = bk
: