i am not a mathematician.
but i like your way of thinking...
n=8-p
b=√(2017-a)
x=n+b
if x = ≥10 then buy iPhone 10
if x = <10 then buy iPhone 8
variables
n= newness value of your current phone vs base model of the newly announced phones (8)
p= your current iPhone model number (iPhone 5 =5; iPhone 7=7)
b= buzz factor value
a= your current age
* i also dont remember my PEMDAS very well...
but i like your way of thinking...
n=8-p
b=√(2017-a)
x=n+b
if x = ≥10 then buy iPhone 10
if x = <10 then buy iPhone 8
variables
n= newness value of your current phone vs base model of the newly announced phones (8)
p= your current iPhone model number (iPhone 5 =5; iPhone 7=7)
b= buzz factor value
a= your current age
* i also dont remember my PEMDAS very well...