A line with slope $\frac 23$ contains the point $P(-18, -12)$. What is the $x$-intercept of the line?
The equation of the line is
y = (2/3) ( x - - 18) - 12 simplify
y = (2/3) ( x + 18) - 12
y = (2/3)x + 12 - 12
y = (2/3)x
To find the x intercept, let y = 0
0 = (2/3)x multiply both sides by (3/2)
0 = x = the x intercept
Nice!