Question

What is the graph of the system y = -2x + 3 and 2x + 4y = -8?

Answer 1

A. https://lss.brainhoney.com/Resource/22181743,AD2,0,C,3,0/Assets/72228_53b5b11e/02_01g_05.gif

I think it's ---> B. https://lss.brainhoney.com/Resource/22181743,AD2,0,C,3,0/Assets/72228_53b5b11e/02_01g_06.gif

C.
https://lss.brainhoney.com/Resource/22181743,AD2,0,C,3,0/Assets/72228_53b5b11e/02_01g_07.gif

D.
https://lss.brainhoney.com/Resource/22181743,AD2,0,C,3,0/Assets/72228_53b5b11e/02_01g_08.gif

Answer 2

@campbell_st I used an online grapher and none of the answer choices match the graph...

Answer 3

what are you asked to do..?

Answer 4

What is the graph of the system y = -2x + 3 and 2x + 4y = -8?

Answer 5

ok... so the 1st line is in slop intercept form

I'll put the 2nd line in slope intercept form

4y = -2x - 8

then

y = -1/2x - 2

so you have 2 lines in slope intercept form
the 1st line has a y- intercept of 3

the 2nd line has a y- intercept of -2

and both lines have negative slopes...

use
https://www.desmos.com/calculator

to graph the lines.... and then compare them to your choices....

your answer is wrong as 1 line has a positive slope and the other a negative slope

Answer 6

So then what would the answer be?

Answer 7

use the line to graph the lines...

then compare it your choices...

Answer 8

I know it's not B. I used an online grapher and it doesn't match with any of my choices at all!

Answer 9

https://www.desmos.com/calculator/g4tx6bop27 It doesn't match any of them!

Answer 10

ok... that sounds odd here is my attempt using Desmos

the equation of the lines are shown on the left.

Answer 11

perhaps you needed to zoom in so the scale on the axes is in 1 units

Answer 12

That's really weird...so based on your graph, the answer is A?

Answer 13

yes... and my graph is the same as your graph, its just that I zoomed to have axes showing units of 1

Answer 14

Oh ok thanks for explaing that!