Answer:
slope m = 1 , y- intercept c = - 10
Explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
given
- x + y = - 10 ( add x to both sides )
y = x - 10 ← in slope- intercept form
with slope m = 1 and y- intercept c = - 10