Question

can chu help me?

Answer 1

hint: calculate the slope of 2x + 3y = -9

any ideas how?

Answer 2

should i use 0 for x and y?

Answer 3

convert the equation to y = mx + b form

Answer 4

we start by subtracting 2x from both sides to go from

2x + 3y = -9

to

3y = -2x - 9

any ideas on what the slope is now?

Answer 5

no............

Answer 6

divide both sides by 3

Answer 7

y = (-2/3)x - 3

now what's the slope?

Answer 8

-2/3

Answer 9

great, so if the slope is -2/3 does the function have a positive or negative rate of change?

Answer 10

negative

Answer 11

excellent, let's go to #2

Answer 12

what's the slope of

y = 3x - 6?

Answer 13

3

Answer 14

good, so positive or negative rate of change?

Answer 15

positive

Answer 16

excellent, let's do #3

Answer 17

as the x-values are increasing by 1, the y values are:

9, 7, and 5

are the y values increasing or decreasing?

Answer 18

decreasing

Answer 19

good, so that should be a negative rate of change

Answer 20

last one

Answer 21

same as above right?

Answer 22

-8, -7, -6

are the y values getting bigger or smaller?

Answer 23

smaller

Answer 24

think carefully

Answer 25

is -8 bigger than -7?

Answer 26

bigger, cuz they are getting closer to 0

Answer 27

good, so positive rate of change

Answer 28

so to summarize

Answer 29

1 is negative
2 is positive
3 is negative
4 is positive

Answer 30

thank you