Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of $29. For any minutes over 250, Tracy is charged $0.35 per minute. Which of the following piecewise functions represents charges based on Tracy's cell phone plan?

A. f(x)={29,x less than or equal to 250}
{20+.35x,x250}

B. f(x)={29,x250}
{20+.35x,x less than or equal to 250}

C. f(x)={29,x less than or equal to 250}
{.35x,x250}

D. f(x)={29,x less than or equal to 250}
{29+.35(x-250),x250}

Question

Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of $29. For any minutes over 250, Tracy is charged $0.35 per minute. Which of the following piecewise functions represents charges based on Tracy's cell phone plan?

A. f(x)={29,x less than or equal to 250} 
{20+.35x,x>250} 

B. f(x)={29,x>250}
 {20+.35x,x less than or equal to 250} 

C. f(x)={29,x less than or equal to 250} 
{.35x,x>250} 

D. f(x)={29,x less than or equal to 250}
 {29+.35(x-250),x>250}

imstuck · Answer

It's C.  If you were still here, I'd explain to you how to get it.