Question 877128
All these problems use the standard form for a line, y = my +b where m is the slope and b is the y intercept.
1) y = -3x -12
If x = 0, then y = -12
If y = 0, then 3x = -12 and x = -4
y intercept is -12 and x intercept is -4
Graph is
{{{graph (300, 200, -15, 15, -15, 15, -3x -12)}}}