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Exponents and Logarithms · Ages 16–17

Graphing Exponential and Logarithmic Functions

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This worksheet is for 11th-grade math students. Identify the intercepts, asymptotes, and general shape for each curve before sketching.

  1. State the y-intercept and horizontal asymptote for y = 3^x.

  2. Does the graph of y = (1/3)^x rise or fall from left to right, and what is its horizontal asymptote?

  3. Find the x-intercept, vertical asymptote, and domain for y = log3(x).

  4. What is the relationship between the graph of y = 4^x and y = log4(x)?

  5. Determine the vertical asymptote and domain for the transformed function y = log2(x - 3).

  6. Determine the horizontal asymptote and y-intercept for y = 2^x - 4.

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Graphing Exponential and Logarithmic Functions

Answer key

  1. State the y-intercept and horizontal asymptote for y = 3^x.

    y-intercept is (0, 1); horizontal asymptote is y = 0.

  2. Does the graph of y = (1/3)^x rise or fall from left to right, and what is its horizontal asymptote?

    It falls from left to right (decay); horizontal asymptote is y = 0.

  3. Find the x-intercept, vertical asymptote, and domain for y = log3(x).

    x-intercept is (1, 0); vertical asymptote is x = 0; domain is x > 0.

  4. What is the relationship between the graph of y = 4^x and y = log4(x)?

    They are reflections of each other across the diagonal line y = x.

  5. Determine the vertical asymptote and domain for the transformed function y = log2(x - 3).

    Vertical asymptote is x = 3; domain is x > 3.

  6. Determine the horizontal asymptote and y-intercept for y = 2^x - 4.

    Horizontal asymptote is y = -4; y-intercept is (0, -3).