The slope intercept form of the equation of a line is given as:
y = mx + c
where m = the slope of the line
c = the y - intercept of the line
1) Two line are parallel if they have the same slope
That is:

2) Two equations are perpendicular if the slope of one is the negative inverse of the other.

3) Two equations are coincidental if they have the same slope and the same y intercept
Answer:
This is the answer of your question ☺☺
Step-by-step explanation:
(x+7)2 -49=0
2x+14-49=0
2x-35=0
2x=35
x=17.5
Answer:
C. 
Step-by-step explanation:
Let be the parametric equations
and
, we need to clear
and eliminate it afterwards to obtain a function of the form
:


(1)


(2)
By (1) and (2):



Hence, the correct answer is C.