Final answer:
The distance formula is √((x2 - x1)^2 + (y2 - y1)^2). While none of the options perfectly match this, option b) is closest if we correct the apparent types in it.
Step-by-step explanation:
The correct distance formula to find the distance between two points (x1, y1) and (x2, y2) in a coordinate plane is given by √((x2 - x1)2 + (y2 - y1)2). None of the options provided in the question exactly matches the correct distance formula, but considering common typos and errors, the closest one to the correct formula appears to be option b) (x2 - x)2 + (92 - y i) 2. However, it seems like there's a typo as '92 - yi' should likely be 'y2 - y1' to represent the correct formula. Therefore, assuming '92' is meant to be 'y2' and 'yi' is 'y1', the correct formula would be: b) (x2 - x1)2 + (y2 - y1)2