Solve for x- round to the nearest tenth- Trigonometry

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

An equation where variables are used to represent known values—function notation true or false

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 jamie pay at the end?