Question

The y-intercept of the line whose equation is x - y = 7 is?

Answer 1

put in form y=mx+b

when x i s 0 b is the y intercept

add y to both sides and subtract 7 both sides
what do you get

Answer 2

y=x+7

Answer 3

x-y = 7
x-y+y = 7+y we added y both sides we get
x=7+y now we subtract 7

x-7 = 7-7+y we get

x-7=y or y = x-7

y-intercept is -7