<u>Examining the question:</u>
We are given the expression:
We know from Basic trigonometry that:
<u>Simplifying the expression:</u>
Replacing these values in the given expression, we get:
Since the denominator of both the values in the denominator is the same:
We know that 
= 
, using the same property:
and we are done!
Answer:
This is a simple slope intercept form equation: y=ax+b
Where a is the slope and b is the y-intercept, but in this problem the y-intercept is 0 so it is no shown.
The line on the graph would be negative (downward) because of the negative and would be going down by a slope of -5.
-down 5 over 1 ( rise over run )
X=-1 y=-1, x=1 y=5, x=3 y=11
