The formula  f(c)  =9/5   c  +  32 calculates the temperature in degrees fahrenheit, given a temperature in degrees celsius. you can find an equation for the temperature in degrees celsius for a given temperature in degrees fahrenheit by finding the function’s 

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.