Finding Domain, Asymptote, and Intercepts of a Logarithm

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Taught by mrbrianmclogan
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Lesson Summary:

In this lesson, we learn to find the domain, vertical asymptote, and x-intercepts of a logarithm. The teacher explains the importance of knowing the parent graph and how to find transformations. Through examples, we see that transformations such as shifting up or down and reflecting about the x-axis do not change the domain, but we learn to use the exponential form to find the x-intercepts. Overall, this lesson provides a good foundation for understanding the basics of logarithmic functions.

Lesson Description:

Finding the domain vertical asymptote and x intercepts of a logarithm

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Questions answered by this video:
  • In y=-log x + 2, does the transformation of (i) +2 affect the domain? (ii) -log x affect the domain?
  • Find the x-intercept in y= -logx(base4)+3