Write a rule for the function represented in the table.
x y
0 9
1 28
2 47
3 66

Question

Write a rule for the function represented in the table. 
x             y
0            9
1          28
2          47
3         66

anonymous · Answer

Help?   I tried and tried

anonymous · Answer

is y = 19 +9x

anonymous · Answer

my choices are:

y = 9 + 19x
y = 18 + 10x
y = 19 + 9x
y = 10 + 18x

anonymous · Answer

I think it is y = 19 +9x

the_fizicx99 · Answer

M = y2 -y1 / x2 - x1

M = 47 - 28 / 2 - 1

M = 19/1 = 19

y-y1=m(x-x1)

y - 28 = 19(x - 1)

y - 28 = 19x - 19
   +28            +28

y = 19x + 9 <- function rule

Check: change y for f(x) and plug in 2 for x, you should get 47, if not then it doesn't work.

f(x) = 19x + 9
f(2) = 19(2) + 9 --> 38 + 9 = 47 $\ \color{green}{\checkmark}$ this rule works

anonymous · Answer

Wow!  Thanks. Detailed. Ok going to read it just sec.

the_fizicx99 · Answer

Close, it's y = 19x + 9 :P

anonymous · Answer

Glad I was at least close!  Thanks! Can I ask one more ? I will close this and then ask on another so you can get more points.

the_fizicx99 · Answer

Points don't really matter to be honest, it's only virtual! :P sure ask :>

anonymous · Answer

Ok thanks. Just sec