Answer:
part 1: 110 dollars
part 2: 1900 dollars
Step-by-step explanation:
what is the change in Frank's total pay for each copy of history is fun he sells?
We know y = 110x + 1900
if he sells 1 copy of history is fun (x = 1), his salary is
y = 110x + 1900
y = 110(1) + 1900 = 2010
if he sells 2 copy of history is fun (x = 2), his salary is
y = 110(2) + 1900 = 2120
Hence, his change in total pay for each copy is 2120 - 2010 = 110 dollars
what is Frank's total pay if he doesn't sell any copies of history is fun?
if he doesn't sell any copy, then x = 0, we plug that in into the formula, so his pay is
y = 110x + 1900
y = 110(0) + 1900
y = 1900 dollars
Hence, total pay is 1900 dollars if he doesn't sell any copy of history is fun.