# Thread: graphing: Will graph of y = 2x + 7 pass below the origin?

1. ## graphing: Will graph of y = 2x + 7 pass below the origin?

True or False: The graph of y=2x+7 will pass below the origin.

Why is this false?

2. ## Re: graphing

y = mx + b

y-intercept is y = 7.

Generally, +7 is considered "above" the origin.

3. ## Re: graphing

What if x=-20 then y would equal -33?

4. ## Re: graphing

"pass below" implies x = 0.

On a highway, are you "below" a bridge when you are 20 miles from the bridge?

5. ## Re: graphing

So are you saying it would have to be on the y axis?

6. Originally Posted by srgdean
So are you saying it would have to be on the y axis?
Try graphing the line. Look at the picture. Compare the line with the location of the origin. What do you see?

Eliz.

7. ## Re: graphing

Originally Posted by srgdean
So are you saying it would have to be on the y axis?
That is what "pass below" means to me.

8. ## Re: graphing: Will graph of y = 2x + 7 pass below the origin?

Thanks, I see now.

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