Write the equation of the line given the following informati
Write the equation of the line given the following information
Solution
Std equation of line: y = mx +c
where m is the slope and c = y intercept
i ) m= -7/3 c =3
y= -7x/3 +3
ii) m = -1; c= -2
y = -x -2
iii) From the graph : y intercept c= 3
Lets find two points to calculate slope m ( 0,3) and ( -2, 2)
m = (2-3)/( -2-0) = -1/-2 = 1/2
y = x/2 +3 ( Equation)
iv) Point ( 3, -4) and m = -1/3
We would use ( 3, -4) to find c
So, y = -x/3 +c.Plug the point ( 3, -4)
-4 = -3/3 +c ----> c= -3
y = -x/3 -3
