The 7 in 506,087 is in the ones place.
Add the common difference to a term to get the next term.
-10
-10 + (-2) = -12
-12 + (-2) = -14
etc.
The sequence is
-10, -12, -14, -16, -18, -20, -22, -24, -26, -28
The answer would be 1 11/20.
Your slope is -2 for every 5 and your y intercept is 2
