Question

Can someone help me with a question for a medal please???

Answer 1

Sure, just ask :)

Answer 2

Choose the system of equations which matches the following graph.

Answer 3

The options are:
5x − y = 7
2x − y = 0

5x − y = 7
2x + y = 0

5x + y = −7
2x + y = 0

5x + y = −7
2x − y = 0

Answer 4

Ugh, hang on let me get rid of the question marks

Answer 5

Do you want the answer or an explanation (which would be rather long)?

Answer 6

Answer first, than explanation?

Answer 7

I am confused so I would like to know how its done so I can figure it out if there is another question similar to this one

Answer 8

Finding the equation with the negative slope is easy.

Do you know what the y-intercept is?

And can you figure out the slope?

Answer 9

Hang on, I'll retype the answers so it will be easier for us

Answer 10

5x - y = 7
2x - y = 0

5x - y = 7
2x + y = 0

5x + y = -7
2x + y = 0

5x + y = -7
2x - y = 0

Answer 11

Do you see how the y-intercept is 0 and the slope is -2?

Answer 12

Yeah

Answer 13

Ok great so we can use y = mx + b
plug in m and b

y = -2x + 0
y = -2x

Answer 14

Which is the same as 2x - y = 0

Already we see the answer must be A or D

Answer 15

To find the second line's equation is a little harder

Answer 16

We don't know the y-intercept, but we can use the point-slope formula