Remember that at the grocery store, one customer buys 3 pounds of bananas for $1.74, and another customer buys 5 pounds of bananas for $2.90. Which option shows the correct calculation of the cost per pound of bananas?

(Hint: Since the total cost is the dependent variable and the number of pounds is the independent variable, the change in total costs corresponds to the change in y, and the change in pounds corresponds to the change in x.)

a.) 2.90−1.745−3=1.162=0.58
b.) 5−32.90−1.74=21.16≈1.72
c.) 1.74−2.905−3=−1.162=−0.58
d.) 2.90−1.74=1.16