An internet service provider charges $50 a month. the user gets 10 gb of free internet usage. once the usage goes over 10 gb, the company charges the user $4 per gb. this rate continues until the usage reaches 25 gb, beyond which the company charges the user $3 per gb. which graph shows the monthly bill for a user whose usage is x gb?

See figure attached.

Step-by-step explanation:

Let's define:

x: internet usage, in GB

y: cost,  in $

Between 0 GB and 10 GB, the cost is always $50.

Between 10 GB and 25 GB, cost is a line with slope = $4 per GB which pass through point (10, 50), the last point of the previous segment.

From 25 GB on, cost is a line with slope = $3 per GB which pass through point (25, 110), the last point of the previous segment.

the clues that signal the reader should change tone are the punctuation marks, the grammatical signs. for example, the quotation marks at the beginning of something someone else said literally or the exclamation marks.

the tone of the first line of dialogue until "gettysburg" is a kind tone, a tone of advise. the narrator is trying to the other person in doing something he or she obviously is finding hard to do by giving a piece of advise and bringing up a memory of a successful similar case.

the clue that the reader understand how to read the word "bang" is the exclamation mark. it gives the word a surprise tone, a strong accent.

the best tone for reading the word "bang" is an exciting tone, a surprise one, even a loud one.

the words that should be read with a formal tone are the ones that give factual information. the sentence: mister lincoln couldn't think of anything to say at the gettysburg" gives information about an event and it needs to be read formally, also, when the narrator wants to transmit calmness, a formal and slow tone is needed, because people also transmit messages with the vibrations of our voices and tones.