Question

How do you graph the equation by plotting points `y=3x+4`?

Answer 1

graph{3x+4 [-10, 10, -5, 5]}

Explanation:

you can spot 2 points on the x and y axes and draw a line that passes through them.
For x-axis: y=0 then `0=3x+4`
`-4=3x`
`x=-4/3`
so we've found the point that the line intercepts x-axis : `(-4/3,0)`

Find the point on y axis similarly, by letting x=0
`y=3*0+4`
`y=4`
Therefore the point that the line intercepts y-axis : `(0,4)`

Mark them on the graph and combine them with a line

graph{3x+4 [-10, 10, -5, 5]}

Feel free to ask questions if you have any