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OlgaM077 [116]
3 years ago
15

Find the range of f(x)=-2x-5 for domain -2, -1, 1, 2

Mathematics
2 answers:
SashulF [63]3 years ago
8 0
Range = {-2(-2) - 5, -2(-1) - 5, -2(1) - 5, -2(2) - 5} = {4 - 5, 2 - 5, -2 - 5, -4 - 5} = (-1, -3, -7, -9}
Salsk061 [2.6K]3 years ago
6 0

Answer:

{-1, -3, -7, -9} is  the range of the function f(x)

Step-by-step explanation:

Domain is the set of all complete possible values of x variable.

Range is the set of all values of f(x)

Given the function:

f(x) = -2x-5        .....[1]

Domain: {-2, -1, 1, 2}

For x = -2,

Substitute in [1] we have

f(-2) = -2(-2)-5 = 4-5 = -1

Similarly ,

For x = -1

f(-1) = -2(-1)-5 = 2-5 = -3

For x = 1:

f(1) = -2(1)-5 = -2-5 = -7

For x = 2

f(2) = -2(2)-5 = -4-5 = -9

Therefore, the range of f(x) = {-1, -3, -7, -9}

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