Their is $1 in this bag

What are the domain and range of f(x)=[1/5]x

Astudent survey asked: "how tall are you (in inches)? " here's the data: 67, 72, 73, 60, 65, 86, 72, 69, 74 give the five number summary. a. median: 73, mean: 70.89, iqr: 5, min: 60, max: 74 b. 60, 66, 72, 73.5, 86 c. 60, 67, 72, 73, 74 d. 0, 60, 70, 89, 74, 100

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"