Sorry for the bad handwriting but here's your answer :)
Perpendicular slope is 4/5
If you want it to be easier to add, just do it like this: 200,000+ 30,000= 230,000
If you want me to be more specific, put this: 201,000+ 29,000= 230,000
It really doesn't matter because both estimates are the same answer, so you can put whichever one. Hope this helps
Thats my answer :)))
The problem belongs to indirect variation.
formula for indirect variation is 
we have 
we know that 
now we need find 
when 
Since he started with Nothing
He had zero initially
After x Months...
He'll have 10x naxvips
in slope intercept form
y=10x
To get the y values ... substitute the corresponding x value
For x=0
y=10(0)
y=0. Which is true cos he had no naxvip initially
x=1
y=10(1)
=10. Which is true cos he buys 10 more monthly... So 10 + 0 = 10.
x=2
y=10(2) = 20. This is true cos he added an additional 10 after each month
x=7
y=70.
