Question

Which equation represents a linear function?
y – 2 = –5(x – 2)
x + 7 = –4(x + 8)
y – 3 = y(x + 4)
y + 9 = x(x – 1)

Answer 1

which one is the equation of a line?
if you are not sure, you can try to make each into the form
y= m x + b
(that is slope-intercept form of the equation of a line)
If you can make the equation look like that you know it is a linear equation