How do u express a ratio as a decimal

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

15/16 as a decimal rounded to the nearest hundredth

Ascatter plot with a trend line is shown below. which equation best represents the given data? y = x + 2 y = x + 5 y = 2x + 5