Question

Help needed!

What is the rule for the function shown in the table?

1.) y = 1/3x + 1
2.) y = 3x + 1
3.) y = 1/3x
4.) y = 1/2x + 1

Answer 1

@Michele_Laino

Answer 2

http://tex.z-dn.net/?f=y%3Dmx%2Bb+%5C%5C+%5C%5Cx_1%3D-1+%5C%5C+y_1%3D-2+%5C%5C+%5C%5C+x_2%3D0+%5C%5C+y_2%3D1+%5C%5C+%5C%5C%0Am%3D%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D%3D%5Cfac%7B1-%28-2%29%7D%7B0-%28-1%29%7D%3D%5Cfrac%7B1%2B2%7D%7B0%2B1%7D%3D%5Cfrac%7B3%7D%7B1%7D%3D3+%5C%5C+%5C%5C%0Ay%3D3x%2Bb+%5C%5C%0A%280%2C1%29+%5C%5C%0A1%3D3+%5Ctimes+0%2Bb+%5C%5C%0A1%3D0%2Bb+%5C%5C%0Ab%3D1+%5C%5C+%5C%5C%0A%5Cboxed%7By%3D3x%2B1%7D+%5CLeftarrow+%5Chbox%7Banswer+C%7D

Answer 3

you get it?

Answer 4

Yes

Answer 5

ok good

Answer 6

Is s/he right?

Answer 7

we have to start from this formula:
y=a*x+b
and we have to determine the coefficients a, and b, using data stored into your table

Answer 8

now I consider the first point, namely:
x=0, and y=1

Answer 9

substituting those value, I get:
1=a*0+b
what is b?

Answer 10

values*

Answer 11

@I_love_my_nieces what is b, please?

Answer 12

How would I figure out what b is

Answer 13

here is my relationship, after that substitution:
1= a*0+ b

Answer 14

i think B is correct

Answer 15

But you just your are 100% sure that c is the answer...

Answer 16

sorry i typed the wrong i met to say B

Answer 17

the answer letter is just differ but its B

Answer 18

So my answer is y=3x+1?

Answer 19

@Lolipop_Drum312 @Michele_Laino

Answer 20

that's right! @I_love_my_nieces

Answer 21

correct!!