Please help me I will give out extra points and the brain thing.
 Dontina is ordering uniforms for her employees. The company Dontina is ordering from charges $18 per uniform and a shipping fee of $7.
 Based on this information, which function can be used to represent the relationship between the total cost, c, and the number of uniforms Dontina orders, n?
 c=7n−18
 c = 18n + 7
 c=18n−7
 c = 7n + 18