Question

Which is an equation in point-slope form for the given point and slope?



Point: (5, 9); Slope: 2









A.

y – 5 = 2(x + 9)








B.

y + 9 = 2(x – 5)








C.

y – 9 = 2(x + 5)








D.

y – 9 = 2(x – 5)

Answer 1

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

so when given Point: (5, 9); Slope: 2
plug in m = 2 x1 = 5 and y1 = 9
into y - y1 = m(x - x1)

Answer 2

d.

Answer 3

yep :)

Answer 4

thx I got 5 more questions though

Answer 5

I can help with those too :)

Answer 6

Which is an equation in point-slope form for the given point and slope?



Point: (–8, 3); Slope: 6









A.

y + 3 = 6x – 48








B.

y + 3 = 6(x + 8)








C.

y – 3 = 6(x – 8)








D.

y – 3 = 6(x + 8)

Answer 7

same idea as before :)

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

so when given Point: (–8, 3); Slope: 6
plug in m = 6 x1 = -8 and y1 = 3
into y - y1 = m(x - x1)

Answer 8

c.

Answer 9

be careful :)
when you plug in the x1 = -8
y - y1 = m(x - (-8))
^ negative times negative equals positive

Answer 10

ohhh b.

Answer 11

the y1 = 3
would remain negative
so you would have gotten
y - 3 = 6(x + 8)

Answer 12

d. definitely d.

Answer 13

yep :)

Answer 14

thx :D

Answer 15

you're welcome :)

Answer 16

2 more instead of 3

Answer 17

sure :)

Answer 18

Which is an equation in point-slope form for the given point and slope?



Point: (1, –7); Slope: \[-\frac{ 2 }{3} \]

Answer 19

same idea as before :)

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

so when given Point: (1, –7); Slope: −2/3
plug in m = -2/3 x1 = 1 and y1 = -7
into y - y1 = m(x - x1)

Answer 20

\[y-7= -\frac{2}{3}\]

Answer 21

\[y+7=\frac{ 2 }{ 3 }\]

Answer 22

\[y-7=\frac{ 2 }{ 3 }\]

Answer 23

\[y+7=-\frac{ 2 }{ 3 }\]

Answer 24

\[y - (-7) = (-\frac{ 2 }{ 3 }) (x - (1))\]

Answer 25

d.

Answer 26

yep :)

Answer 27

:D one last question

Answer 28

ok :)

Answer 29

A yearbook printer charges based on the number of pages printed. Here is a table that shows the cost of some recent yearbooks:

Answer 30

Which equation gives the cost, y, in terms of the number of pages, x?









A.

y = 83.3x + 0.65








B.

y = 0.012x + 49.985








C.

y = 0.012x + 0.65








D.

y = 0.012x + 1.25

Answer 31

1.85 minus 1.25 = 0.6
so every 50 pages = 0.6
then 0.6 divided by 50 = how much one page costs = 0.012
when pages = 0
cost = 1.25 - 0.6 = 0.65

so when y = mx + b
m = 0.012 and b = 0.65

Answer 32

c

Answer 33

yep :)

Answer 34

thx! :D

Answer 35

you're welcome :)