Approximate the value of {{MATH_172}}. Is this an overestimate or an underestimate? {{CMD_173}} To make a linear approximation, we need to determine a function and the point {{MATH_174}} to use. In this example, it would make sense to use {{MATH_175}} for the function which means the question is asking for us to approximate {{MATH_176}}. For the point {{MATH_177}} we need a value near {{MATH_178}} that we can calculate {{MATH_179}} and {{MATH_180}}. Using {{MATH_181}} works for this since {{MATH_182}} and {{MATH_183}} so {{MATH_184}}. The linear approximation function is {{MATH_185}}. That makes {{MATH_186}}.