Band c? ? i already did the table

Now you're trying hard to make something hard out of something easy.

It gives you the equation . . .      C = -7.11 t + 153.9

b).  Take this equation, and calculate 'C' when 't' is -20.

                                 Find 'C' :     C = (-7.11)(-20) + 153.9

                                                 I'm sure you can do this easily.

c).  Take this equation, and calculate what 't' would have to be
       in order to have  C=50 .

                                   Find 't':     50 = (-7.11) t + 153.9

                                               I'm sure you can do this easily too.