Question

Find the equation of the line using the given information.
The slope is undefined and it passes through the point
(x, y) = (7, 4).

Answer 1

Any ideas?

Answer 2

Hint: A vertical line has no slope.

Answer 3

Note: No slope is not the same as 0 slope.

Answer 4

No slope means the slope is undefined.

0 slope means the slope has a value of 0.

Answer 5

Undefined means a vertical line, and is always of the form x=

Here's an example:
A vertical line passes through the point (5, 17)

The equation of the line must be x=5.



And another example:
A vertical line passes through the point (-7, 6)

The equation of the line must be x=-7.

Answer 6

i put x=-4 and it says incorrect then it says Recall that the slope of a horizontal line is 0 and the slope of a vertical line is undefined. Note that the point-slope and slope-intercept formulas do not apply to vertical lines since the slope is undefined. If a line is vertical, which coordinate remains the same for every point on the line, the x-coordinate or the y-coordinate? Is the equation of a vertical line through the point
(a, b); x = a, x = b, y = a, or y = b?

Answer 7

Look at my examples above, then find the equation of yours:

A vertical line passes through the point (7, 4)

equation of the line...?

Answer 8

7?

Answer 9

That isn't an equation. See my examples and how i wrote the equation.

Answer 10

x=7

Answer 11

Yes.

Answer 12

okay, so i have this one/ Find the equation of the line using the given information.
The slope equals zero and it passes through the point
(x, y) = (1, −9).

Answer 13

would it be that x=-9?

Answer 14

No, slope of zero is not the same as undefined. Slope of zero means the equation is y=

Eg.
The slope equals zero and it passes through the point (-9, 5)

The equation must be y=5.

Answer 15

so it would be y=1

Answer 16

Look at my example again.

Answer 17

I'm confused.

Answer 18

Eg.
The slope equals zero and it passes through the point (-15, 12)

The equation must be y=12.

Answer 19

y=-9

Answer 20

Yes.

Answer 21

Find the slope of the line that passes through the given points.
(−9, 2)
and
(5, −3)

then it says Recall that the slope of a line is the rise over the run. Which coordinates tell the rise, the change in height? To find the run, should the x-coordinates be added or subtracted? Does it matter in which order the points are used?

Answer 22

For two points, \(\large (x_1, y_1)\) and \(\large (x_2, y_2)\) the slope is:\[\large m = \frac{ y_2 - y_1 }{ x_2 - x_1 }\]

Eg.
for the points \(\large (3, 5)\) and \(\large (2, 8)\)
\[\Large m = \frac{ 8-5 }{ 2-3 } = \frac{ 3 }{ -1}=-3\]

Answer 23

so m = -9

Answer 24

no wait.

Answer 25

Show work.

Answer 26

idk how you got 2,3 on the bottom

Answer 27

I'm just confused.

Answer 28

Because those are the x2 and x1. On the top, you subtract the y values, on the bottom, you subtract the x values.

(−9, 2) and (5, −3)
\[\large m = \frac{ -3 - 2 }{ 5- (-9) }=?\]

Answer 29

so on the top it would be -5 and on the bottom it would be -14?

Answer 30

so it would be that divided or subtracted?

Answer 31

Two negatives make a positive. 5-(-9) = 5+9.

Answer 32

14.

Answer 33

so negative 5 and 14

Answer 34

\[\large m = \frac{ -3 - 2 }{ 5- (-9) }=\frac{ -5}{14 }\]You can't simplify any more.

Answer 35

I'm trying to enter it into webasign and i can't see the side bar where it allows me to put a fraction there.

Answer 36

Then type that into a calculator

Answer 37

-2.8

Answer 38

nervmind got it.

Answer 39

Find the slope of the line that passes through the given points.
(−1, −2)
and
(3, 4)

Answer 40

so slopes would be whats listed.

Answer 41

-5/14 is not -2.8

Answer 42

i go it already

Answer 43

Just use the slope formula again

Answer 44

3/2

Answer 45

m=3/2

Answer 46

Yes

Answer 47

A surveyor's map is drawn on a coordinate grid. Find the slope m of the line passing through the two labeled points.
m =

Answer 48

Just use the slope formula again

Answer 49

but i don't know what points for sure.

Answer 50

wow wait I'm an idiot.

Answer 51

okay

Answer 52

They're right there lol

Answer 53

-6/11

Answer 54

m=

Answer 55

Yes

Answer 56

Find the x- and y-intercepts of the equation.
−4x + 5y = 40

okay this ons confused me, i put none for x intercept and then 0,40 for y intercept but it says wrong

Answer 57

For the y-int:
plug x=0 into the equation

For the x-int:
plug y=0 into the equation

Answer 58

how do i do that?

Answer 59

plug x=0 means replace x with 0

Answer 60

sides wouldn't be equal

Answer 61

Find the x- and y-intercepts of the equation.
−4x + 5y = 40

For the y-int:
plug x=0 into the equation:
−4(0) + 5y = 40

solve for y

Answer 62

y = 8

Answer 63

So (0, 8) is your y-int.

Now find the x-int as i described above.

Answer 64

-4, 0

Answer 65

or 0,-4

Answer 66

No...

Find the x- and y-intercepts of the equation.
−4x + 5y = 40

For the x-int:
plug y=0 into the equation:
−4x + 5(0) = 40

solve for x

Answer 67

-10

Answer 68

x-int is (-10, 0)

Answer 69

Sketch a line with the given features.
A y-intercept of
(0, 5)
and slope
−
7
2

Answer 70

slope = - 7/ 2

Answer 71

its like this

Answer 72

I gotta go though :P

Post it as a new question.