Poll of the Day > how do you graph y=3x + 4

(+) Yeah! (+)

ugh, calculus is killing me
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Pretty sure you've done this one before.

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it's literally 3x + 4.

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Is that even calculus? I think that's just algebra.

I haven't done this for like 20+ years, but here's my thinking.

The left/right axis is X, the up/down axis is Y.

So, for a given position on the X axis, the position of Y will be 3 times whatever X is, plus 4.
So... at X=0, we get Y=4 (3 times 0 is 0, plus 4).

One x,y point is at 0,4.

Now for X=1, we get Y=7... so the next point is at the x,y of 1,7
X=2 is Y=10
X=3 is Y=13

And plotting out all these points will be graphing a straight line, which is why this is called a linear equation. If you do this on a piece of graph paper, and your line is drawn correctly, you can then just look at the line and where the points are at, and not even have to do the math.

Oh here's something I found out a few years ago, you can just google this, and they will show you the answer. It works for simple math, so Google is basically a calculator, and it works on equations as well (I just checked it, and it shows the graph).

Oh, I think I forgot, you're looking for a solution. Does it say something like "solve for X"?

You'd just have to move things around. The two sides of the equals sign should balance out, so if you perform a mathematical operation, you do it to both sides. So subtract four from both sides, and you get y-4=3x.

Then, divide both sides by 3, and you get x= (y-4)/3 (it's a fraction)

There might be a better way, it's been a while for me and I'm just winging it.

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

There are people seriously answering this question?
https://www.google.com/search?q=3x+%2B+4

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He asked how to graph it out, so that's not actually an answer.

I doubt he'd be able to do a google search while being tested.