contestada

What transformation has changed the parent function f(x) = log3x to its new appearance shown in the graph below?

logarithmic graph passing through point 1, negative 2.

f(x − 2)
f(x + 2)
f(x) − 2
f(x) + 2

Respuesta :

luisejr77

Answer: Third option

[tex]f(x) - 2[/tex]

Step-by-step explanation:

The function [tex]y=log_3 (x)[/tex] passes through the point (1,0) since the function [tex]y=log_a (x)[/tex] always cuts the x-axis at [tex]x = 1[/tex].

Then, if the transformed function passes through point (1,-2) then this means that the graph of [tex]y=log_3(x)[/tex] was moved vertically 2 units down.

The transformation that displaces the graphically of a function k units downwards is:

[tex]y = f (x) + k[/tex]

Where k is a negative number. In this case [tex]k = -2[/tex]

Then the transformation is:

[tex]f(x) -2[/tex]

and the transformed function is:

[tex]y = log_3 (x) -2[/tex]

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