Sophia: Equations, Functions, and Variables: Lesson 1

Following his intuitive manner, Sal considers another set of parametric equations. This time, he looks at two equations using trigonometric functions and, using one of the basic trigonometric identities, removes the parameter from the...

This lesson explains how equations are related to functions and variables. It is 3 of 5 in the series titled "Equations, Functions, and Variables."

Determine how functions and variables are related to equations. Assess learning with a quiz.

This lesson will explain explanatory and response variables. It is 1 of 3 in the series titled "Explanatory and Response Variables."

This interactive website provides a variety of lesson plans according to which standards you are applying and which textbook you use. Introduce functions to your class by having them construct single operation machines and create...

Translate a word problem into a rational equation. This word problem might cause some to pause and ponder, and some to just give up and skip the problem altogether. It does involve some fractions, so watch this video and get a better...

Two variables in an equation and you want to solve for one in terms of the other. Watch the instructor demonstrate the steps to isolate each variable. She will use the subtraction rule of equality and the division rule of equality to...

Two equations. Wait! They don't look like the same kind of equations. How do you solve a system of equations when one equation is linear and the other is a quadratic? Watch this video as the instructor illustrates how to use the...

This lesson derives the equation for a circle starting from the distance formula. It is 1 of 9 in the series titled "Finding the Equation of a Circle." [3:58]

This lesson will present the Hypotenuse-Leg Triangle Congruence Theorem. It is 1 of 5 in the series titled "Triangle Congruence Theorem (HL)." [5:01]