Expert: Paul Klarreich - 1/11/2012

Question
It ask for you to find the function rule from the graph and the graph states that x|0|1|2|3|4| and y|1|-4|-9|-14|-19|. What is it I'm so confused!

Answer
Questioner:U. N. Owen
Country:Pennsylvania, United States
Category:Advanced Math
Private:Yes   <<<<<<<<<<<<<<<  changed
Subject:Plz help with this confusing algebra problem
Question:

It ask

It ask?????????????

Please show enough respect for the volunteers here to check your typing.

for you to find the function rule from the graph and the graph states that x|0|1|2|3|4| and y|1|-4|-9|-14|-19|. What is it I'm so confused!
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ASSUMING you have a linear function (you did not say), determine the slope:
   y2 - y1
m = ---------
   x2 - x1

and take (x1,y1) and (x2,y2) as any of your pairs.

You will get  m = -5

THEN use the point-slope form:

y - y0 = m(x - x0)

taking (x0,y0) as any of your pairs, then simplify.

You will get   y = -5x + 1.

If you get stuck, send me what you did and I'll see what I can do.