Current Events > how do you graph y = 3x + 4

(+) Yeah! (+)

ugh, calculus is killing me
---

With this API

https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API

---

Is this a real question?

---

Iirc you draw a diagonal line. Idk for sure though.

Huh, I was right

---

This isn't necessarily calculus. Only thing calculus will tell you in this equation is the natural slope, which is just dy/dx = 3.

However, the original equation is completely the slope equation of y = mx + b where b is the y intercept.
This graph is a straight line with a rise over run of 3 and it crosses the y-axis at positive 4.


---

Functions: how to be functional
Calculus: how to get what you want



---

If you're doing it by hand

Just input a number for x and calculate the corresponding y placement on graph.

Then play connect the dots.

For 0: y = 3(0) +4 -> y = 4

For 1: y = 3(1) + 4 -> y = 7

For 2: y = 3(2) + 4 -> y = 10.

So on and so forth. Plot a few points then draw the line. In this case the line is straight so its not a big deal. When there are whacky curves and what not it can be helpful to plot points between whole numbers.

---

post #7 does a pretty good job at explaining it
the equation just states that y will be equal to a given transformation of the value of x in any ordered pair, so just replace the x in "y = 3x +4" with that value in the ordered pair and you'll have the y coordinate

Philoktetes posted...

ugh, calculus is killing me

This is 6th grade math.

---