At a certain company, each employee has a salary grade s that is at least 1 and at most 7. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 7 receives how many more dollars per hour than an employee with a salary grade of 1?  Choose one
A) $0.50	B) $1.00	C) $1.25	D) $1.50	E) $1.75
Salary grade of 7 is p(7)=9.50+0.25(7–1)=9.50+0.25*6;   Salary grade of 1 is p(1)=9.50 + 0.25(1–1)=9.50;   p(7)-p(1)=9.50+0.25*6-9.50=1.5.   Answer: $1.50.
<result>D</result>
At a certain company, each employee has a salary grade s that is at least 1 and at most 7. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 7 receives how many more dollars per hour than an employee with a salary grade of 1?