Question

Find the value of x if the slope of the line passing through(2,5)and(x,30) is 2.

Answer 1

$Slope = \frac{y2 - y1}{x2 - x1}$

$\longrightarrow \: \frac{30 - 5}{x - 2} = 2$

$\longrightarrow \: 30 - 5 = 2x - 4$

$\longrightarrow \: 25 + 4 = 2x$

$\longrightarrow \: 2x = 29$

$\longrightarrow \: x = \frac{29}{2}$

$\longrightarrow \: 14.5$