Which graph represents f(x) = (x + 2)2 – 3?

Chose the graph below that represents the following system of inequality’s

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

Which term best describes the association between variables a and b