Hi
the standard slope-intercept form for an equation of a lineis: y = mx + b
where m is the slope and b the y-intercept.
slopes and y intercept can be read off the standard form:
y = -6/5x -6 m = -6/5 y-intercept pt(0,-6)
f(x)= -7x -9 m = -7 y-intercept pt(0,-9)
3 - 1/3y = 7x Or y = -21x +9 m = -21 y-intercept pt(0,9)
Might recommend posting others separately.