# The cost to a newspaper company for Sunday home delivery is approximately $0.45 per newspaper with fixed costs of$2,050,000. How do you write a linear equation that relates the cost C and the number x of copies delivered?

I would try: $C \left(x\right) = 0.45 x + 2 , 050 , 000$
Considering that you have a fixed amount $b$ and a variable one $m$ that depends on the number of copies $x$ sold, you can use the general form for a (linear) equation:
$y = m x + b$