Question

How to solve this part

Answer 1

Try this solution (the way shown is not the shortest one):

The task on the left part:

1. note, the point P and R have coordinates (-4;-4) and (-3;-2).

2. using the coordinates of points P and R it is possible to make up the equation of the required line:

`(x-x_P)/(x_R-x_P) =(y-y_P)/(y_R-y_P); \ => \ (x+4)/(-3+4)=(y+4)/(-2+4); \ => \ (x+4)/(1)=(y+4)/(2)  \ or \ <strong><u>y=2x+4</u></strong>`

The task of the right part:

1. note, the common view of the equation of the line is y=kx+b, where b - an intersection point of the Y-axis and the given line; k=QR/PQ.

2. according the picture b= -5, k=4/1=5, so y= -4x-5