Help please l

B

Step-by-step explanation:

A way to tell if something is a function is through what's called the vertical line test. What I mean by that is if you can draw a vertical line through any area in the graph and it only touches the line/coordinate 1 or less times it's a function.

Another way of thinking about this is "something is a function if there are no identical x values"

therefore the answer is B

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation:

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5