Is it a function and domain and range:

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

yes it is

for a relation to occur,

1. the domain must have unique images in the codomain

2. the whole domain must be mapped

when we look at the function above, we have

2-4

6-2

4-2

5-4

-8-6

Step-by-step explanation:

we see that all the domains are mapped uniquely to codomains

hence, it is a function, having a domain and range

there is nothing below so i cannot

step-by-step explanation:

y= 2x+7

changed to y= 5x +7

as slope is increased from 2 to 5

therefore it would be less steeper

so, option d) is correct