document.write( "Question 436488: Lifting weights can increase a \n" );
document.write( "person’s muscle mass. Each additional pound of \n" );
document.write( "muscle burns an extra 40 calories per day. Write a \n" );
document.write( "linear function that models the number of calories \n" );
document.write( "burned each day by x pounds of muscle. By burning \n" );
document.write( "an extra 3500 calories a person can lose \n" );
document.write( "1 pound of fat. How many pounds of muscle are \n" );
document.write( "needed to burn 1 pound of fat in 30 days?\r \n" );
document.write( "\n" );
document.write( "I have the formula of : f(x)= ax + b \n" );
document.write( "I am not sure where to start? \n" );
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