Question

how to find the slope of a line with a equation y= -x +4 with the equation y2-y1/x2-x1

Answer 1

you don't need to. An equation of a line is usually in the form of y=mx+c
where m is the slope. your m here is the coefficient of x which is -1.

Answer 2

I need 2 points though

Answer 3

Can you solve it?

Answer 4

just write the equation of the line y=mx+c and then write you're equation beside it and then say m= -1, m=slope therefore slope = -1. that should give you 2points since you explained shortly.