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Mathematics 18 Online
OpenStudy (anonymous):

The graph below represents which system of inequalities?

OpenStudy (anonymous):

OpenStudy (anonymous):

y < -2x + 6 y < x + 2 y -2x + 6 y x + 2 y < x - 2 y > 2x + 2 None of the above

OpenStudy (anonymous):

Ok Let's start with the Yellow graph. Let's look at it like a line ok?

OpenStudy (anonymous):

Ok :)

OpenStudy (anonymous):

Now we know that the equation of a line is Y = Mx +B right?

OpenStudy (anonymous):

B or D. Im not sure because the symbols are gone for B.

OpenStudy (anonymous):

The symbols for B is <=

OpenStudy (anonymous):

and yes @babyshawol

OpenStudy (anonymous):

Ok so by looking at the line we can find the slope which is Rise/Run. So by picking a point we can find the slope.

OpenStudy (anonymous):

I'll show you an example wait

OpenStudy (anonymous):

So As you can see Where the black outline is I picked 2 points that were clear so count the Vertical units and the horizontal units of the black outline. What do you get?

OpenStudy (radar):

The principal factor in this problem is to determine whether it is \[< or \le \]to determine which answer is correct A or B What does the dashed line indicate? Does that mean it includes the line (=)? Or does that mean only greater than the line?

OpenStudy (radar):

I think you already have established the equations for the lines: y=-2x + 6 y= x + 2

OpenStudy (radar):

All that remains is to determine whether y is greater than or is y equal to and greater than.

OpenStudy (anonymous):

It means the it is less than or more than but not equal to so therefore A would be correct?

OpenStudy (radar):

I am inclined to agree with you, as otherwise if it was B they would of used a solid line (I believe that is the convention)

OpenStudy (radar):

The third choice is wrong as it does not represent the lines in your graph.

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