Slope word problems

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Marsha gets a job that pays $15 per hour, and she started the week with $20

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Nicholas received $100 for his birthday. He decides to spend $20 per day on whatever he wants.

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Olivia runs every day after school. She has already run 4 miles, and she can run one mile per hour.

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Quincy notices that a tree grows by about one inch every month since bought it. When he bought the tree, it was 18 inches tall.

Muzi has already taken 2 pictures at home, and she expects to take 1 picture during every day of vacation. Write an equation that shows the relationship between the days of vacation x and the total number of pictures taken y.

Neo has already written 1 page, and she expects to write 1 page for every additional hour spent writing. Write an equation that shows the relationship between the hours spent writing x and the total pages written y.