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.
Demand for a good is said to be price elastic if the elasticity measure is greater than one in absolute value and inelastic if less than one. The cross-price elasticity of demand measures the proportionate change in the quantity demanded of one good to the proportionate price change of another good.