High School · Reasoning with Equations and Inequalities

CCSS.MATH.CONTENT.HSA.REI.D.11

Explain why the x-coordinates of the points where the graphs of the equations y = f(x) and y = g(x) intersect are the solutions of the equation f(x) = g(x); find the solutions approximately, e.g., using technology to graph the functions, make tables of values, or find successive approximations. Include cases where f(x) and/or g(x) are linear, polynomial, rational, absolute value, exponential, and logarithmic functions.

Read this standard on the official Common Core site

Lessons that teach this standard

• Solving Equations by Graphing Both Sides

  Why the x-coordinates where y = f(x) and y = g(x) cross are the solutions of f(x) = g(x), and how to approximate them with a graph, a table and successive narrowing.