Question 1133394
For two points ({{{x[0]}}},{{{y[0]}}}) and ({{{x[1]}}},{{{y[1]}}}), the slope m is the rise over run: m = {{{ (y[1]-y[0]) / (x[1]-x[0])}}}<br>

Just plug in the values given:

(a)  m = {{{ ((x^2+3x-1)-3) / (x-1) }}}  
and reduce...

I got  {{{ m = x+4 }}}, with the restriction {{{x <> 1}}} <br>

Part (b) is done similarly