How to Graph a Log Function?

Identify the function in the form (y = alog_b(x-h) + k)

Find the vertical asymptote by setting the log argument equal to 0

Determine the domain from where the log argument is positive

Plot the vertical asymptote as a dashed line

Find the x-intercept by setting (y = 0) and solving for (x)

Find the y-intercept only if (x = 0) is in the domain

Choose several x-values in the domain

Compute the corresponding y-values

Plot the points on the coordinate plane

Use the base (b) to note the general growth pattern

Apply vertical stretch or compression using (|a|)

Reflect across the x-axis if (a < 0)

Shift the graph left or right using (h)

Shift the graph up or down using (k)

Draw a smooth curve through the points approaching the asymptote

Check that the graph stays on the correct side of the asymptote

Verify the graph matches the expected shape of a logarithmic curve

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