For part B the fixed cost is 500 dollars because it is a set inital amount, the varibale cost is .15 because it is the cost dependent on something else (per indicated variable part)
y=.15x+500 .15 cents per flyer, add 500 because that is the set amount it costs to even create the flyer
Plug in 500 for the equation y=.15(500)+500 y=75+500 y=575
for part a
b=ka for direct variations so the direct one is C - two items directly multiplied
y=mx+b for partial variation so its A,D - basically the equation of a line
A is neither - shows neither of these relationships
