Question

x+2y(is greater than or equal to)-9: i need points for the linar equation

Answer 1

Eventhough it's an inequality, you can treat it like an equation and make this in the straight line general form. You you understand that part?

Answer 2

not really..... :/

Answer 3

Do you know the form y=mx+b ?

Answer 4

yes i do, is that what i use to get the two points?

Answer 5

No but you can get the gradient and y-intercept which should be enough to make a straight line.

Answer 6

which would be -7??

Answer 7

im sorry im so terrible at math!

Answer 8

Alright here I'll show you.

Answer 9

omg i love you

Answer 10

So you have \[x+2y \ge-9\]As I said you can treat it like an equation so can make it so that you get the general straight line form y=mx+b
So you subtract both sides with x and divide everything by 2 and get:\[y \ge-\frac{ 9 }{ 2 }-\frac{ 1 }{ 2 }x\]
which can be rewritten as: \[y \ge-\frac{ 1 }{ 2 }x-\frac{ 9 }{ 2 }\] And this is similar to the form y=mx+b where m is the gradient and b is the y-intercept :) Can you make the straight line from here?

Answer 11

ahsdlkjfeoij i hate math!!! but thank you!! um... does y=-9?

Answer 12

idk! we just learned this today, and i was completely zoned out during class

Answer 13

The y-intercept? No it is -9/2 from the last equation I wrote :) It's ok you can learn. So from the last equation, you can see that the gradient, m, is -1/2 and the y intercept -9/2

Answer 14

thank you so much! what ever your name is!! one last queestion.. if it is just greater than, is it a straight line? or a dotted line?

Answer 15

Ah so if has 'or equal to' it is a full line. If not, it's a dotted line.

Answer 16

i love you, you are my new best friend

Answer 17

Haha you're welcome. My name is Wolfe btw :)

Answer 18

im Hannah! obviously:) thanks again!