I really need help asap

Write the equation below the represents the line passing through the point (-3, -1) negative one with a slope of 4

When y’all answer can y’all explain too !

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?