Math graph please show the equation for the graph

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

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

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.