[填空题]
The equation of a liitd wc ++:bmr f2+qx 1mpl+nfgz*- yj2jo1vp6e 7scsl)0 m1i cne $L_1$ is y−3x+5=0.
1.For the line $L_1$, find:
(1)the $x$-intercept;x =
(2)the gradient. y = ax+b a = b =
A second line, $L_2$, intersects the $y$-axis at P(0,2)(0,2) and is parallel to $L_1$.
2.Find the equation of $L_2$. Give your answer in the form y=mx+c. m = c =
A third line, $L_3$, passes through the point Q(3,1) and is perpendicular to $L_1$.
3.Find the gradient of the line $L_3$. $m_{L_3}$ =
4.Find the equation of $L_3$, giving your answer in the form ax+by+d=0,
where a,b,d∈Z. a = b = d =
