Question

Choose the system of equations which matches the following graph

Answer 1

3x – y = –4
5x – y = –8

Answer 2

3x – y = –4
5x + y = –8

Answer 3

3x + y = –4
5x – y = –8

Answer 4

3x + y = –4
5x + y = –8

Answer 5

which set of equations is it?

Answer 6

It would be helpful to rewrite the equations into slope intercept form. Recall this is the form y=mx+b. Doing this will make it easier to identify the slope. Since from your picture we see both of these lines are angled downward from left to right, we know that the slop of these lines will be some negative number. This should help you eliminate a few possibilities right off the bat.

Answer 7

would the first one be y = -3x + 4

Answer 8

y = -5x + 8 ?

Answer 9

Be careful you, you lost a minus sign. An easy way to avoid this would be just add the y to the right, then add the 4 to the left. for y=3x+4.

Answer 10

woops my bad

Answer 11

y = 5x + 8?

Answer 12

i worked out some of these equations on paper. is the answer c?

Answer 13

Y=5x+8 is correct. Now take it one step further. Since the slope of both of those lines are positive, that system is definitely not the answer to you problem!

Answer 14

so it's not a

Answer 15

B. y = 3x + 4 and y = -5x + 8

Answer 16

?

Answer 17

y=3x+4 hasa positive slope so thats not it. Remember also, for slope intercept form, y=mx+b , b is the y intercept. This means, b is where the line crosses the y axis. In the graph, it looks like the lines cross at -8 and -4. Try looking closer at D.

Answer 18

y = -3x - 4 and y = -5x - 8

Answer 19

i think that it's D

Answer 20

cause they both have negative slope and same intercept as graph

Answer 21

am i right?