Question 788658
You can use the Point-Slope form of equation of a line.

Start with the formula for Slope:  {{{m=(y-v)/(x-u)}}} and expect you know the value of m, and you know the point (u,v).  Multiply both members by (x-u):


{{{m(x-u)=y-v}}}
{{{y-v=m(x-u)}}}----------This may be taken as a generalized Point-Slope equation for a line.


Substitute your given values.  For your #2, this is how you start:
{{{highlight(y-(-1)=-5(x-9))}}}
Put this into either Slope-Intercept or Standard Form.
{{{y+1=-5x+45}}}
{{{highlight(y=-5x+44)}}}, the slope-intercept form.