Answer:
These are both 20 so that means that this is proportional, yes.
Step-by-step explanation:
Hi.
To figure this out we can do something called cross multiplying to find a cross product. If we do this and our two answers are equal then it is indeed a proportion.
Here is how we do this.

So basically what we are doing is multiplying across in a diagonal direction.
Diagonal meaning like a slash / .
So in this case we would multiply the 4 and the 5 , since they're diagonal from each other.
Do the same for the 2 and the 10.
So we have to multiply :
4 x 5
2 x 10
=
20
These are both 20 so that means that this is proportional, yes.
Hope this helps.
If you have any questions or concerns feel free to message me.
You may be trying hard to make something difficult out of something easy here.
You have said that a(n) = 8n . (I can't write a subscript 'n'on this site either,
but 'a(n)' will serve the same purpose.)
So . . . (get ready) . . .
a(n) = (8) times (n)
a(1) = 8
a(2) = 16
a(3) = 24
a(4) = 32
a(5) = 40
a(6) = 48
.
.
a(100) = 800
a(101) = 808
.
.
etc.
Answer:
y-intercept=15 b/c it is the b value in y=mx+b or you can plug in 0 for x, and get 15 also
x-intercept=3 b/c when y is 0, x is 3
slope= -5 b/c it is the value of m in y=mx+b