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October 21, 2014

October 21, 2014

Posted by **Valerie** on Friday, April 22, 2011 at 6:46pm.

11) x y

1 -1

3 3

5 7

10 ?

50 ?

100 ?

I don't understand what I'm suppose to do! Please hep and explan well! Thank you!

- Math -
**w**, Friday, April 22, 2011 at 6:51pmX|Y

---

0|(-3)

1|-1

2|(1)

3|3

4|(5)

5|7

y=2x-3

- Math -
**w**, Friday, April 22, 2011 at 6:53pmwhen x=10, y=17

when x=50, y=97

when x=100, y=197

- Math -
**Valerie**, Friday, April 22, 2011 at 6:54pmThat is no where near what I need I need help please!

- Math -
**Valerie**, Friday, April 22, 2011 at 6:55pmThank you(:

- Math -
**Damon**, Friday, April 22, 2011 at 7:14pmValerie,

Read what w said carefully

y = 2 x - 3 !!!

for any x, that gives you y

w noticed that all the given points sat in the straight line y = 2x-3

- Math -
**Damon**, Friday, April 22, 2011 at 7:18pmNow the wayt ot figure that out is to take the slope between any two points

like here

m = (7-3)/(5-3) = 4/2 = 2

so if there is a linear relation

y = 2 x + b

now what is b?

when x = 1, y = -1

-1 = 2 + b

so b = -3

now check to make sure that fits all points, then use it.

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