Latasha is a retired teacher living in Dallas who teaches clarinet lessons to supplement their normal income. At an hourly wage rate of $$15,$ they are willing to teach $5$ hours per week. Upping the wage to $$25$ per hour, they are willing to teach $14$ hours per week.

Using the midpoint method, the elasticity of Latasha's labor supply between the wages of $$15$ and $$25$ per hour is approximately means that Latasha's supply of labor over this wage range is