10 points lol 6th grade math coordinate points

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

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2