Is it a function and domain and range:

{(2,-4),(6,-2),(4,-2),(5,-4,(-8,-6) }

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  yes, it is a function

  domain: {-8, 2 ,4, 5, 6}

  range: {-6, -4, -2}

Step-by-step explanation:

The domain is the set of first values of the ordered pairs: {2, 6, 4, 5, -8}. We often like to see them in order:

  domain: {-8, 2 ,4, 5, 6}

The range is the set of second values of the ordered pairs.

  range: {-6, -4, -2}

There are no repeated values in the domain, so the relation is a function.

b

step-by-step explanation:

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0