Question

Find the rate of change between the two points: (8, 1) and (4, 2) where x is in months and y is in inches.


25 inches per month

-.25 inches per month

4 inches per month

-4 inches per month

Answer 1

i think its -4 but im not sure

Answer 2

\[\frac { 2-1}{4-8}= -\frac 1 4=-.25
\]

Answer 3

rate of change = (change in y)/(change in x)


change in y = 2 - 1 = 1

change in x = 4 - 8 = -4


rate of change = (change in y)/(change in x)


rate of change = 1/(-4)


rate of change = -1/4


rate of change = -0.25


So the rate of change is -0.25 inches per month

Answer 4

is it neagtive or positive

Answer 5

It's negative. It might help to plot the two points and draw a line through them. You'll see that this line slopes downward (as you read it from left to right).