Finding Y intercepts on graph of 2x + y = 7

[marshall1432]

I'm not very good at math but I need help with a problem.

Find the y-intercepts of the graph of 2x+y=7

I thought I had to set it up like this: 2x-7=-y and then solve it but I don't know.

i wasnt sure if the answer came out to be 7 or (7,0)

HELP!!!!

 

[arthur ohlsten]

2x+y=7

the equation of a line is usually written as
y=mx+b where m is the slope and b the y intercept

given: 2x+y=7 subtract 2x from each side
y=-2x+7 a straight line slope=-2 y intercept = 7 answer

you wrote the equation as :
2x-7=-y multiply both sides by -1 ,[to get a positive y]
7-2x=y a staight line slope -2 y intercept =7
of course this is more readily seen if we rewrite the :
y=-2x+7

Arthur

 

[Denis]

i wasnt sure if the answer came out to be 7 or (7,0)

"y intercept" means the line crosses the y axis at +7;
by default, that's graph point (0,7).