Connect the red wire to the positive (+) terminal of one of the cells, and connect the black wire to the negative (-) terminal of the other cell. Later, as a last step, you will connect a wire between the negative (-) terminal of the first cell and the positive (+) terminal of the other cell.
Inelastic market conditions occur when the supply or demand of a good is relatively resistant to changes in price. Economists sometimes use the term qualitatively to describe goods in the marketplace, but may also apply mathematical formulas to quantify the degree to which market conditions are elastic or inelastic.
From the supplier's viewpoint, this is a highly desirable situation because price and total revenue are directly related; an increase in price increases total revenue despite a fall in the quantity demanded. An example of a product with inelastic demand is gasoline.