Question

Barry has been watching the geese that live in his neighborhood. The number of geese changes each week.


n f(n)
1 56
2 28
3 14
4 7


Which function best shows the relationship between n and f(n)?
f(n) = 28(0.5)n

f(n) = 56(0.5)n-1

f(n) = 56(0.5)n

f(n) = 112(0.5)n-1

please help?

Answer 1

@Data_LG2

Answer 2

y=mx+b ->slope intercept form of the line.
m=slope, b=y-intercept , (x,y) any point.

first, find the slope. choose any two points (n, f(n)) from the given and use the slope formula. Do you know the slope formula?

Answer 3

Y1-Y2 over X1-X2 right?

Answer 4

@Data_LG2

Answer 5

I used the points (1, 56) and (2,28)

Answer 6

@DLS

Answer 7

@dumbcow can you please help me??

Answer 8

@greenlegodude57

Answer 9

Is it B @greenlegodude57

Answer 10

@YanaSidlinskiy

Answer 11

@driftracer305

Answer 12

just plug in n=1 and see which one gives you 56

Answer 13

so its C @dumbcow

Answer 14

nope that gives 28

Answer 15

oh its D i got C and D confused so am i right?

Answer 16

well no D gives 112 ... seems we are playing a guessing game. you now have a 50/50 shot

Answer 17

I thought it was D because i divided 112 by .5 and got 56 so is it B then?

Answer 18

the exponent is "n-1" remember that initial value is n=1

1-1 = 0 ...... .5^0 = 1

thats why its 112 for D

yes B is correct because .5^(1-1) = .5^0 = 1

Answer 19

ok thank you do you think you could help me with another? @dumbcow