write the equation of the line that passes through the point
write the equation of the line that passes through the points (-2,3) and (-4,5) using the following steps
a. find the slope of the line that passes through the points (-2,3)(-4,5)
b. find the y-intercept of the line
c.write the equation of the line
Solution
a) First we use the generic point (x,y) and one of the point (-2,3) or (-4,5) so, we use the points:
(-2,3) and (x,y) and then....
m= x - -2 then....
y - 3
(y-3)m = x+2 and we use the next item to know \"m\"
Now we have m=1 and we use in the equation of the slope
(y -3)1 = x+2 so...
y - 3 = x+2 then...
x+2-y+3=0
x-y+5 = 0
b) find the y-intercept (m) of the line
m= y2 - y1 = 5 - 3 = 2 = 1
x2 - x1 -4 - -2 -2
c) Write the equation of the line
We have to use the vector equation
x - x1 = y - y1 then
x2 - x1 y2- y1
x + y = 1 is the equation of the line...
