A recent study found that one's earnings are affected by the mathematics courses one has taken. In particular, compared to someone making $30,000 who had taken no calculus, a comparable person who had taken x years of calculus would be earning$30,000e0.195x.Find the rate of change of this function atx =1.(Round your answer to the nearest whole number.)f'(1)=Interpret your answer.Annual salary ---Select--- increases decreases by about $ per extra year of calculus.