Question

Match each item in Column A to an answer in Column B.

1.

(1 pt)
Which functions have a positive rate of change and which have a negative rate of change?
Column A Column B
1. A.positive
2x – 3y = 9 B.negative

2.
y = −4x + 5

3.
x y
−1 −5
1 1
3 7

4.
x y
1 −2
2 −6
3 −10

Answer 1

@roz_mar23 @sleepyjess

Answer 2

rate of change is also the slope
for #'s 1 and 2....put equation in y = mx + b form where m represents your slope. If the slope is positive, it has a positive rate...if negative, it has a negative rate.

for #'s 3 and 4.....you will need to use slope formula
slope = (y2 - y1) / (x2 - x1)......sub in 2 sets of the points given....and find the slope

any questions ?

Answer 3

@texaschic101 would you mind guideing me though this

Answer 4

@texaschic101 ?

Answer 5

anyone?

Answer 6

@tylermcmullen23 @NeonStrawsForever

Answer 7

1. 2x - 3y = 9 (put in y = mx + b form)
-3y = -2x + 9
y = 2/3x - 3......slope(m) = 2/3.......positive slope

2. y = -4x + 5
slope(m) = -4.......negative slope

3. (y2 - y1) / (x2 - x1)
(-1,-5)....x1 = -1 and y1 = -5
(1,1)...x2 = 1 and y2 = 1
now sub
(1 - (-5) / (1 - (-1)
(1 + 5) / (1 + 1)
6/2 = 3.......so the slope is 3......positive slope

4. (y2 - y1) / (x2 - x1)
(1,-2)...x1 = 1 and y1 = -2
(2,-6)...x2 = 2 and y2 = -6
now we sub
(-6 - (-2) / (2 - 1)
(-6 + 2) / 1
-4/1.....slope is -4.....negative slope

any questions ?