Question

Choose the equation below that represents the line passing through the point (-3, -1) with a slope of 4.

y - 1 = 4(x - 3)

y + 1 = 4(x + 3)

y - 3 = 4(x + 1)

y + 3 = 4(x - 1)

Answer 1

point slope form: y - y1 = m(x - x1)
when m = slope and given the point (x1, y1)

Answer 2

i think its y + 1 = 4(x + 3)

Answer 3

correct! :)

Answer 4

What is the domain of f(x)?

-2 < x ≤ 3

-2 ≤ x < 3

-1 < y ≤ 3

-1 ≤ y < 3

Answer 5

domain has to do with x
which is horizontally
closed hole means "or equal to"
open hole does not have the "or equal to" line

Answer 6

is it -1 < y ≤ 3

Answer 7

try again

Answer 8

domain has to do with x

Answer 9

that is the range

Answer 10

so then it would be -2 ≤ x < 3

Answer 11

closed hole at x = 3
so x ≤ 3

Answer 12

ok

Answer 13

the other one

Answer 14

so then its the oppisite way around which is-2 < x ≤ 3

Answer 15

yep :)

Answer 16

If x represents time, the average rate of change of the function f(x) in the first three seconds is ___

Answer 17

average rate of change = slope
so figure out the slope

Answer 18

slope = 4/3??

Answer 19

or 3/2 or 1 im not sure

Answer 20

mmm not quite?
it's going down so negative, first of all
then
try making it out of points
(1, 100) , (3, 0)

Answer 21

5/4

Answer 22

errr do you have options?

Answer 23

1

Answer 24

huh?

well, I'm thinking the misconception is that the grid isn't by ones
like across it goes 0, 0.5, 1, 1.5, 2, 2.5, ect
while up it goes 0, 20, 40, 60, etc
so if you look at the slope based on the numbers and not grids
take the points (1, 100) and (3, 0) and find the slope :/

Answer 25

100/7

Answer 26

mmm I'm getting -100/2

Answer 27

i can kinda see were you got that

Answer 28

\[slope = \frac{ rise }{ run } = \frac{ y _{2}-y _{1} }{ x _{2}-x _{1} } = \frac{ 0-100 }{ 3-1 }\]

Answer 29

here just help me on this one

Answer 30

Choose the equation below that represents the line passing through the point (2, -5) with a slope of -3.

y = -3x - 13

y = -3x + 11

y = -3x + 13

y = -3x + 1

Answer 31

slope-intercept form: y = mx + b
when m = slope and b = y-intercept

Answer 32

i got y=-3x+13

Answer 33

-3x+13

Answer 34

try again?
y = -3x + b
-5 = -3(2) + b

Answer 35

+11

Answer 36

no it would be a negative right

Answer 37

-5 = -3(2) + b
-5 = -6 + b
+6 +6
1 = b

Answer 38

Choose the equation of the horizontal line that passes through the point (1, -5).

y = -5

x = 1

y = 1

x = -5

Answer 39

horizontal line is y = (something)
(x, y) = (1, -5)

Answer 40

i think its x=1

Answer 41

i thought horizontal line is x

Answer 42

oh

Answer 43

so then it would be y=-5

Answer 44

yep :)

Answer 45

y = -2x - 6

y = negative two thirdsx + 6

y = -negative two thirdsx + 6

y = 2x + 6

Answer 46

i think its y= - 2/3+6

Answer 47

yep :)

Answer 48

one more

Answer 49

never mind i got it thanks for all the help

Answer 50

you're welcome :)