Question 243565
First, get the formula in y = mx + b format.
.
4x + 5y = 20
Subtract 4x from both sides
5y = 20 - 4x = -4x + 20
Divide both sides by 5
{{{y = (-4x)/5 + 20/5 = -(4/5)x + 4}}}
.
when x=0, y = 4
when y=0, x = 5
.

Graph:
{{{
graph(500,500,-10,10,-10,10,-4/5*x+4)
}}}
.
Done