Explanation

gradient $m = tan \theta, m = ?$

then,

$7 = tan \theta$

$\theta = tan^{-1}7 = 81.7$

thus, the angle the line makes with the y-axis is $90 - 81.7 = 8.3$

gradient $m = tan \theta, m = ?$

then,

$7 = tan \theta$

$\theta = tan^{-1}7 = 81.7$

thus, the angle the line makes with the y-axis is $90 - 81.7 = 8.3$