Unit Rate is the correct answer, I know because it is the correct answer
For number 10 the y-intercept is going to be at -1 1/3 not -1.
Answer:
Total number of pages is 540.
Step-by-step explanation:
Let mark read x be he number of pages per day and d be the number of days to finish the book.
Total number of pages = xd
Mark reads 18 pages less per day than originally planned, he will need 5 extra days to finish the book.

.... (1)
He reads 24 pages less per day, he will need 8 extra days to finish.
... (2)
Subtract 5 times of equation (2) from equation (1).
Substitute d=10 in equation (1).
Divide both sides by 5.
Total number of pages
Therefore , the total number of pages is 540.
The answer is -9 because when there are this lines around the x it mean that you need to make it opposite. Therefore x=-9