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

Feb 18, 2016

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 $0 = 3 x + 4$
$- 4 = 3 x$
$x = - \frac{4}{3}$
so we've found the point that the line intercepts x-axis : $\left(- \frac{4}{3} , 0\right)$

Find the point on y axis similarly, by letting x=0
$y = 3 \cdot 0 + 4$
$y = 4$
Therefore the point that the line intercepts y-axis : $\left(0 , 4\right)$

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