21 is 75% of what number? i don't get it.

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

The test scores of 32 students are listed below. construct a boxplot for the data set and include the values of the 5-number summary. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99