Home > CALC > Chapter 7 > Lesson 7.4.1 > Problem 7-177
Write the equation of the tangent line to
Use point-slope form of a line.
will give you the point, and will give you the slope.
Use your tangent line to approximate
Since a linear equation is easier to evaluate than a 4th-degree polynomial, use the tangent line to approximate
Is the approximation an over or under estimate of the actual value?
Is the graph of
concave up or down ?