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

Feb 26, 2017

See explanation

#### Explanation:

You basically select random values for $x$ and calculate $y$ for each by replacing the chose value of x in the equation $y = 4 x + 3$

So let's say we choose

$x = 0$, then $y = 4 \left(0\right) + 3 = 3$
$x = 1 ,$ then $y = 4 \left(1\right) + 3 = 7$
$x = 2 ,$ then $y = 4 \left(2\right) + 3 = 11$

You can carry on calculating more values if you wish, so now you can plot the following coordinates :

$\left(0 , 3\right)$
$\left(1 , 7\right)$
$\left(2 , 11\right)$

And join them, you should obtain the following graph

graph{y=4x+3 [-20, 20, -10, 10]}