Can i get with this question pl and

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

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?

What does the sign of the slope tell you about a line?