SOLUTION: Hi need some help with this problem, little bit confused. I am to determine if the relationship represented in the table is linear. If it is linear, how would I write an equatio

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Question 411011: Hi need some help with this problem, little bit confused.
I am to determine if the relationship represented in the table is linear. If it is linear, how would I write an equation?
x | 10 | 15 | 20 | 25 | 30 | 35 |
y | 10 | 20 | 30 | 40 | 40 | 50 |
I believe this is not a linear but if not how would I know.
Some of the choice I am looking at if it is linear would any of these fit.
y = 15x + 10
y = 10x + 20
y = 20x + 10
Thanks a bunch :o)
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

Ordered pairs: (10,10),(15,20),(20,30),(25,40),(30,40),(35,50)

(15,20)

(10,10)  m = 10/5 = 2  and 

y = 2x + b  

10 = 2*10 + b

-10 = b    |y = 2x -10

 1) (For the 1st 4 ordered pairs y =2x-10 works)..however NOT for the last two

These ordered pairs do not have a linear relationship