What does the expression d+1.5 represent?

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

The graph of which equation includes the points (0, 10) and (10, 11)? y = 10x + 11 y = x + 10 y= 1/10x + 10 y = 1/10x + 11

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year