gthif6088
12.11.2019 •
Mathematics
What transformation of the parent function f(x) is made to get 4f(x + 2)?
o
a. a vertical stretch by 4 and horizontal shrink by 1/2
o b. a vertical stretch by 4 and horizontal shrink by 2
o
c. a vertical stretch by 4 and 2 units in the x-direction
o
d. a vertical stretch by 4 and -2 units in the x-direction
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Ответ:
Option D - a vertical stretch by 4 and -2 units in the x-direction
Step-by-step explanation:
To find : What transformation of the parent function f(x) is made to get ?
Solution :
The parent function is f(x)
The transformed function is
As 4 is multiplied by the function,
When f(x)→a f(x) a>1 then it stretch vertically by a factor of a.
So, there is a vertical stretch by 4.
As 2 is added in the function,
When f(x)→f(x+a) then it shift left or in -x direction by a factor of a.
So, there is a shift of -2 units in the x-direction.
Therefore, option D is correct.
Ответ:
Step-by-step explanation:
The slope of this line = (y₂ - y₁) ÷ (x₂ - x₁)
= (2 - (- 1 )) ÷ (-6 - (-4))
= 3 ÷ (-2)
= - ³/₂
The equation of the line can be determined using the point-slope form:
y - y₁ = m(x - x₁)
⇒ y - 2 = -³/₂(x - (-6))
y - 2 = -³/₂ (x + 6)