Question

a line that includes the point (1,-1) has a slope of -2.What is its equation slope intercept

Answer 1

the slope-intercept form is: y=mx+b

if you know m=-2 (the slope) you can replace the value of x and y for the point (1,-1)

so:

-1=-2*1+b

-1=-2+b

-1+2=b

b=1

So the answer is: y=-2x+1