Question 1018514
the graph of the equation of y = ln(x+2) - 1 is shown below.
look below the graph for further comments.


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your answers are described below.


Consider the logarithmic equation f(x) = ln (x + 2) – 1. Round all values to the tenths place.
(a) Determine any x- and y-intercepts.


the x-intercept is found by setting y = 0 and solving for x.


y = ln(x+2)-1 becomes 0 = ln(x+2)-1.
add 1 to both sides of this equation to get ln(x+2) = 1
this is true if and only if e^1 = x+2
solve for x to get x = .71828.....


the y-intercept is found by setting x = 0 and solving for y.
y = ln(x+2)-1 becomes y = ln(2)-1.
solve for y to get y = .30685...


these are rounded to 3 decimal places on the graph.


the vertical asymptote is found when the argument inside the equation of y = ln(x+2) - 1 is set to 0.


this occurs when x = -2 because -2 + 2 = 0.


any value of x less than or equal to -2 will be undefined.


any value of x greater than -2 will be defined.


as the value of x gets closer to 0 from the right, the value of y will get progressively larger in a negative direction.


so the value of y approaches negative infinity as x gets closer and closer to -2 from the right.


that's your vertical asymptote.


the function will get progressively larger as x becomes larger going in a positive direction.


there does not appear to be any limit to how high the value of y gets as far as i can see, although it does get up there very slowly.


for example, when x = 9 * 10^99, y = 229.15.


my calculator can't go higher than that, but it appears that there is no limit to the value of y, although the value of y increases extremely slowly in relation to x.


the value of y does not get closer and closer to a limit value, but just keeps getting higher and higher.


therefore, no horizontal asymptote as far as i can determine.


(b) Determine the domain and the equation of the vertical asymptote.


the domain is all real values of x > -2.
the range is all real values of y.


(c) Make a table of values to find three other points on the graph.


this is easy enough for you to do.


simply choose some values of x and then solve the equation for y.


use your calculator to find three other values of x and then solve for y using your scientific calculator or an online scientific calculator if you don't have one.


the equation is y = ln(x+2) - 1


you already have the value of y when x = -2 (it's minus infinity), and when x = 0 (it's -.30685...).


(d) Graph the function. Label the three points you found in Part (c).


i did it for you.
the three points i chose are shown in the following graph.
using the desmos calculator, it's a simple matter of setting x equal to the values that you chose and then finding the intersection, which the desmos calculator will show you.
the desmos calculator does round to 2 or 3 decimal places, so if you want better accuracy, then perform the calculations in your scientific calculator.
here's the graph.


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