(3,4) , (-2, -5) , (?, 0)
First pick the first two coordinate to create a function.
[tex]\begin{gathered} \frac{y-y_1}{x-x_1}\text{ = }\frac{y_2-y_1}{x_2-x_1} \\ \frac{y\text{ - 4}}{x\text{ - 3}}\text{ = }\frac{-5\text{ - 4}}{-2\text{ - }3} \\ \frac{\text{y - 4}}{x\text{ - 3}}\text{ = }\frac{-9}{-5} \\ \frac{y\text{ - 4}}{x\text{ - 3}}\text{ = }\frac{9}{5} \\ \text{Cross multiple} \\ 5(y\text{ - 4) = 9(x - 3)} \\ 5y\text{ - 20 = 9x - }27 \\ 5y\text{ = 9x - 27 + }20 \\ 5y\text{ = 9}x\text{ - }7 \end{gathered}[/tex]Let ? = n
for y = 0,
5(0) = 9x - 7
0 = 9x - 7
9x = 7
x = 7/9
? = 7/9
