The value goes down whats the question
Y = -1x + 1 is the equation of the line
200,000,000 + 40,000,000 + 9,000,000 + 100,000 + 4,000 + 300 + 30
1 joule = 6,242e+18ev
20 joule = 20 joule *6,242e+18 ev/joule =1,248e+20 ev
1,248e+20 ev / (10 ev / photon) =1,248e+19 photons.