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.
This flatter curve means that the good or service in question is elastic. Meanwhile, inelastic demand is represented with a much more upright curve as quantity changes little with a large movement in price. Elasticity of supply works similarly.