Radian: is the standard unit of angular measure, used in many areas of mathmatics.
degree: is a measuement of plane angle, defined by representing a full rotation as 360 degrees.
Both are two units for measuring angles. There are at least four such units, but degrees and radians are most likely to encounter high school and college.
A reflection of horisontal
Answer:
<h2><em><u>5</u></em></h2>
Step-by-step explanation:
<h3><em><u>Given</u></em><em><u> </u></em><em><u>Question</u></em><em><u>:</u></em></h3>

<em><u>Given</u></em><em><u> </u></em><em><u>values</u></em><em><u> </u></em><em><u>-</u></em>
r = 4 , s = 1
<em><u>Therefore</u></em><em><u> </u></em><em><u>putting</u></em><em><u> </u></em><em><u>their</u></em><em><u> </u></em><em><u>values</u></em><em><u> </u></em><em><u>in</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>question</u></em><em><u>, </u></em>

= 4 + 1
= <em><u>5 (Ans)</u></em>
Answer:
when u divide both side by 2 the new equation will be y-5x=-3... and equation of a line is written in form of y=mx+c
so y=5x-3