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Mathematics 20 Online
OpenStudy (anonymous):

Quadrilateral ABCD has vertices at A(-2,-1) . B (-4,-7) C(-9,-3) D(-8,-6) . It is reflected across the x-axis. What are the new coordinates? Explain.

OpenStudy (anonymous):

@ash2326 .. i asked this earlier but i dont think the awsner i got is correct . can u help ?

OpenStudy (anonymous):

i got ; A(-2,1) B(-4,7) C(-9,3) D(-8,6). Because you do the opposite number of the "y " .

hero (hero):

Hint: Use graph paper

OpenStudy (anonymous):

i am

hero (hero):

Okay, next plot the points

OpenStudy (anonymous):

i did

hero (hero):

Okay, next find out how far each point is from the x axis.

hero (hero):

Start with the point closest to the x-axis

OpenStudy (anonymous):

a(-2,1) is 2 away from the x axis and one over.

OpenStudy (anonymous):

so 2.-1 ?? for a

hero (hero):

Whatever the distance each point is from the x-axis, its reflected point will be the same distance. Vertical distance only. the "one over" isn't a vertical distance.

OpenStudy (anonymous):

omg ,

OpenStudy (anonymous):

so confusing

OpenStudy (anonymous):

wait!

hero (hero):

Actually, you just need to figure out how to count distance from the x-axis. When they say x-axis, you must first identify what "x-axis" is.

OpenStudy (anonymous):

cant you just do ; To reflect across the X axis, simply multiply all the Y coordinates by -1.

hero (hero):

Vertical distance means "up and down" distance

hero (hero):

Okay, just wait...

hero (hero):

wait.

hero (hero):

Don't try anything yet, just listen

hero (hero):

Sigh

OpenStudy (anonymous):

imsorry ...

hero (hero):

Okay here's what to do. 1. Put your pencil on the x-axis directly beneath the first point you want to find the distance of. 2. Then draw a line from the x-axis to that point. 3. Count the number of units from the x-axis to that point. 4. The number of units represents the distance from the x-axis to the point 5. The reflected point will be the equal and opposite distance from the x-axis.

hero (hero):

I hope that makes sense.

OpenStudy (anonymous):

It does!

OpenStudy (anonymous):

i got ...

OpenStudy (anonymous):

A(-2,1) B(-4,7) C(-9,3) D(-8,6

hero (hero):

Yeah, that's right. I realize that you already had it. lol

OpenStudy (anonymous):

Lol i was double checking :) thanks!

hero (hero):

Good job

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