2/5 4/10 6/15 8/20 10/25 12/30 are all equivalent to 2/5
3/14 i think.................
this formula, doesn't rely on a product, relies on a "sum", or is namely an arithmetic sequence, aₙ₋₁ -3 is another way of saying, the value of the previous term minus 3, so it relies on the ordinal value of a term, so is an recursive formula, well, let's get it when n = 4.

You circle the points on both sides and then you calculate them and get what you need...
Answer:
1/2x+b=y
1/2*4+b=3
2+b=3
b=1
1/2x+1=y
Step-by-step explanation: