The Following Table Contains Information Regarding Price and Output for a Firm.For

The following table contains information regarding price and output for a firm.For each point except the first, calculate the elasticity between it and the point above.
$$\begin{array} { c c c } \underline { \text { Price} } & \underline { \text { Quantity} } & \underline { \text { Elasticity} } \\\$ 7 & 10 & \underline { \quad \quad \quad \quad } \\6 & 20 & \underline { \quad \quad \quad \quad }\\5 & 30 & \underline { \quad \quad \quad \quad } \\4 & 40 & \underline { \quad \quad \quad \quad }\\3 & 50 & \underline { \quad \quad \quad \quad } \\2 & 60 & \underline { \quad \quad \quad \quad }\\1 & 70 & \underline { \quad \quad \quad \quad }\end{array}$$