Finding the slope of a line

Question

in simplist terms what is the slope of a line that is -5,0 and 5,-3

Answer 1

a line through (-5, 0) and (5,-3) has slope = change in y over change in x = (-3-0)/(5+5) =-3/10

= -.3

the line's equation is y=-3x/10 +b

where b satisfies 0 =-3(-5)/10 +b

b = -15/10 = -3/2 = -1.5

y = -.3x -1.5