04.03) best will get brainleist! angela bought gifts for her friends, and each gift cost $10. let y represent the total cost and x represent the number of gifts. write an equation to represent the proportional relationship between the total cost and the number of gifts she bought.

Find an equation for the linear function which has slope -10 and x-intercept -7

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?