The length of a line is not necessarily a practical value as a line goes on for ever. The length of a line is infinite. However, the length of a line segment is of more value and is a finite value. Any time we measure how long a package is or how long our table is, we are taking the length of a line segment. Learn the formula for finding the length of a line segment when given two points in either 2 dimensions or in 3 dimensions.
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The scalar equation of a line is another way to represent a linear relationship. Learn more about the scalar form of the equation of a line and practice writing the scalar equation form of a line.
Learn what the x-intercept of a function is. Practice locating the x-intercept.
Practice identifying when to use the cosine and sine laws to solve problems.
When we are faced with a quadratic that is not “nice” to factor we need to find a way to factor it. This is where the quadratic formula comes in. The discriminant is a value that can be calculated for each quadratic equation. Depending on the value of the discriminant, we can determine if the quadratic equation has a solution, or has factors, or not.