Question

need help

Answer 1

For instance, if \(x=-3\), what is the value of \(\dfrac{3}{x}+4\)?

Answer 2

3

Answer 3

Very good. Now which of those choices has 3 as the value for f(x) when x=-3? :-)

Answer 4

the first one

Answer 5

Careful! The first one tells me that when \(x=-3\), \(f(x) = -1.5\)!

Answer 6

So it's not the first one. :-/

Answer 7

oh its the second one

Answer 8

Yes, that's the correct one. Just to be 100% sure that it's the correct one, you can see that for x=1, f(x) is \(\dfrac{3}{1}+4=3+4=7\), which matches with what's in the second table.

Does this make sense? :-)

Answer 9

yes

Answer 10

Bruce pitches for his little brother's baseball team. He has observed that the number of pitches a batter hits varies and is given by the function
f(x) = x – 11, where x is the number of pitches and f(x) is the number of hits. If batters get {4, 12, 14, 27, 42} hits, how many pitches did Bruce throw?

Answer 11

The list {4, 12, 14, 27, 42} is the output for various x values for f(x)=x-11. In order to find the number of pitches thrown, you need to solve x-11 = each of the values in the list. i.e. x-11= 4, x-11 = 12, x-11 = 14, x-11 = 27, and x-11 = 42. So what's the appropriate list of pitches thrown?

Can you take things from here? :-)

Answer 12

{15, 23, 25, 38, 53}

Answer 13

Very good. Does that make sense? :-)

Answer 14

yes

Answer 15

for the x i input 15 for the first then 23 and so on

Answer 16

15-11=4
23-11=12

Answer 17

Right, and then you'll start generating the list they gave you for the number of hits; i.e. f(15) = 15 - 11 = 4, etc.