Question 268922
we start with
{{{y = mx + b}}}
we are given x = 0, y = 4 and m = -3. By substitution, we get
{{{4 = -3*0 + b}}}
{{{b = 4}}}
so the equation is
{{{y = -3x + 4}}}
Here is the graph
{{{ graph( 300, 200, -5, 5, -10, 10, y = -3x + 4) }}}