+0

# ​ help!

0
341
3
+266

Jan 27, 2016

#1
+102372
+15

Let's first look at what it's NOT......!!!

It's not linear because the changes in y's and x's are not uniform

Its not a quadratic because the end behavior would be either up-up  or down-down   ......and the data indicates that this is up-down

It could be a cubic in some form such as : y = -ax^3-bx^2 - cx

Jan 27, 2016
edited by CPhill  Jan 27, 2016

#1
+102372
+15

Let's first look at what it's NOT......!!!

It's not linear because the changes in y's and x's are not uniform

Its not a quadratic because the end behavior would be either up-up  or down-down   ......and the data indicates that this is up-down

It could be a cubic in some form such as : y = -ax^3-bx^2 - cx

CPhill Jan 27, 2016
edited by CPhill  Jan 27, 2016
#2
+5

i have NO clue

Jan 27, 2016
#3
0

If it's linear the first difference column will be constant,

if it's a quadratic the second difference column will be constant,

if it's a cubic the third difference column will be constant, ..........etc etc

Jan 28, 2016