Question

Write the equation of the line that passes through (–1, 4) with a slope of –1 in standard form.

Answer 1

y=mx+c

the slope is given so insert the "-1" into m..
you'll get y=-x+c

to get the value of c(y-intercept) insert both value of x and y given in the question:

4=-(-1)+c
4= 1+c
3 = c
c= 3

so the equation would be y=-x+3