math modeling...this is the only problem i keep getting incorrect!

Question

An electric board determines its monthly bills for residential customers by charging a base price of $17.00 plus an energy charge of 13.21 cents for each kilowatt-hour (kWh) used. Write an equation for the monthly charge y (in dollars) as a function of x, the number of kWh used.

 

y = ?

Answer 1

no. of kilo watt use  =x

 

13.21 cent =$ 0.1321

 

 

y = 17 + 0.1321x