find the range of each function for the given domain.
18- f(x)=2x-7; {-2, -1, 0, 1, 2}
19- g(x)=-4x+1; {-5, -1, 0, 1, 2, 10}
20- h(x)=x^2; {-1.2, 0, 0.2, 1.2, 4}
21- f(x)=8x-3; {-1/2, 1/4, 3/4, 1/8}

sorry if this is too much, i just don't really understand how to find the range of a function.. i'd greatly appreciate if you could help me out with the answers. xx

Question

find the range of each function for the given domain.
18- f(x)=2x-7; {-2, -1, 0, 1, 2}
19- g(x)=-4x+1; {-5, -1, 0, 1, 2, 10}
20- h(x)=x^2; {-1.2, 0, 0.2, 1.2, 4}
21- f(x)=8x-3; {-1/2, 1/4, 3/4, 1/8}

sorry if this is too much, i just don't really understand how to find the range of a function.. i'd greatly appreciate if you could help me out with the answers. xx

anonymous · Answer

plug in the domain values in to the function and see what you get
it is going to take a while

anonymous · Answer

$$f(x)=2x-7$$
$$f(-2)=2\times (-2)+7=-4+7=3$$ so one range  value is $3$
now you have to also find 
$$f(-1),f(0),f(1),f(2)$$ to find the other range values

anonymous · Answer

Domain relates to x and Range relates to y or f(x)