What does the decrease in the price of coffee (other things being equal) result in if coffee and tea are substitutes?

The decrease in price for coffee (a substitute for tea) will make consumers demand more coffee than tea. Remember that demand curve runs from the top left corner to the bottom right corner and quantity demanded is on thex-axis ( horizontal axis). Moreover, numbers increase as we move to the right-hand side of the x-axis. This means that if thedemand curve for coffee moves downwards along the demand curve, quantity demanded will be increasing and vice versa. Note that, the movement is happening along the demand curve, the curve itself is not swinging up or down.If the downward movement happens along the demand curve for tea, it means people are buying more tea than coffee because downward movement means increasing in quantity.