Write a number with the digit 8 in the tens place

80 is a good one to start with.

After that, you can move on to  83,  481,  1687, and  102,974,589 . 

Byou start by adding them all and setting them equal to 180 since that is half of the total degrees in a circle.(2x+8) + (3x-14) + (3x-14) = 1808x-20 = 1808x = 200x = 25

I’m pretty sure the slope would be 1 since the x and y values increase by 1