if <1 and <2 are vertical angles. if m<1 = 13x + 5 and m<2= 7x + 35, find the measure of <2

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?