Question

What is the equation of a horizontal line passing through the point (2, 10)?

y = 12

x = −8

y = 10

x = 2

Answer 1

Help me anybody

Answer 2

Your line would be a horizontal line at the y coordinate of your point. Like this:

Answer 3

The x coordinate is meaningless here because you want the horizontal line at (2,10).

Answer 4

Just like if they asked you for the vertical line at that point, the y coordinate would be meaningless and the line would be a vertical line through x = 2, like this:

Answer 5

TY for the medal.

Answer 6

Thank you so much for explaning. Could u help me with this one ?

What is the equation in standard form of the line which passes through (1, −3) and has a slope of 2?

2x − y = 5

2x − y = −5

2x + y = 5

2x + y = −5

Answer 7

Np ur a life saver here

Answer 8

Let me do it then I will post, ok?

Answer 9

2x - y first one
2x - y = - 5 second one

Answer 10

ok

Answer 11

Last one is 2x + y = -5

Answer 12

and its ( 1 , -3)

Answer 13

Got it. The first thing to do is to write it in slope-intercept. Do that by first writing it in point-slope, then rearranging the whole mess. Like this, ok?

Answer 14

\[y-y _{1}=m(x-x _{1})\]\[y-3=2(x-1)\]That is point-slope. Now let's write it slope-intercept.

Answer 15

\[y=2x+1\]

Answer 16

To get it into standard form, which Ax + By = C, just rearrange so the x and y are on the same side of the equals sign. Like this:

Answer 17

-2x+y = 1

Answer 18

Oh wait...the point is (1, -3)? I thought you said it was (1,3). That changes everything!

Answer 19

Re-do!!!

Answer 20

\[y+3=2(x-1)\]THAT is point-slope!

Answer 21

y=2x-5
THAT is slope-intercept.

Answer 22

Wow you know you should be a professor not a mathlete :) ur brilliant

Answer 23

Rearranging to get the x and y on the same side of the equals sign gives you this:
-2x+y = -5 or
2x-y = 5

Answer 24

I'm not brilliant, but I am a math teacher!

Answer 25

I got one last question i hope u dont mind

Use the graph below to answer this question:

graph of line going through (-2,-3) and (1,3)

Find the average rate of change for the given function from x = 1 to x = 2.

-2

negative one-half

one-half

2

Answer 26

Ok, the average rate of change for a line is the slope between the points. So let's graph the line and see what it looks like first, ok?

Answer 27

yes