What is the slope of -7 ,-4 and 7,-4

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

The variable in a relation who’s value depends on the value of the independent variable is called what?

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?