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Lesson 3: Developing an Equation for a Parabola Given
Any y-value
Keoni and Sasha create a general method for representing the x-value for any point on a particular parabola, given the y-value of that point. By using their previous results, along with the Pythagorean theorem, they are able to determine the equation for the parabola.
Episode 1: Making Sense
Sasha and Keoni grapple with how to represent a general point on the parabola and how to express different distances involving that point.
Episode 2: Exploring
Keoni and Sasha develop an equation that relates the x-value to the y-value for a general point on a particular parabola.
Episode 3: Reflecting
Keoni and Sasha reflect on the meaning of their equation.
Episode 4: Repeating Your Reasoning
Keoni and Sasha determine the x-value of a point on the parabola with a y-value of 3.5.
Episode 5: Reflecting
Sasha and Keoni share ideas about the usefulness of the equation x=√(4y), which they derived in Episode 2.