What is the similarity between 85,17,19,4 and 2?

This is so hard and it’s for a test

What is the equation of this graphed line? enter your answer in slope-intercept form in the box.

Jamie went to home depot. she bought 25 bags of soil that cost $9 per bag. she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each. she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jame pay at the end?