Point-point equation
[tex] \frac{y-y_{1}}{x-x_{1}} = \frac{y_{2}-y_{1}}{x_{2}-x_{1}} , \frac{y-10}{x+6} = \frac{-2-10}{12+6} , \frac{y-10}{x+6} = \frac{-12}{18} , \frac{y-10}{x+6} = \frac{-2}{3}
x-intercept is the point when y=0,
we can substitute y with 0.
[/tex]
[tex] \frac{-10}{x+6} = -\frac{2}{3} , \frac{10}{x+6} = \frac{2}{3}
10*3=2(x+6)
30=2x+12
2x=18
x=9,
x-intercept (9.0)[/tex]
