SOLUTION: 1.Find an equation of a line that passes through the points (-2,-3) and (-1,1). y=m(x-x1)+y1 y=4(x-(-2) + (-3) y=4x +8 -3 y=4x + 5 (answer) Is this correct? 2. Find the e

Question 219470: 1.Find an equation of a line that passes through the points (-2,-3) and (-1,1).
y=m(x-x1)+y1
y=4(x-(-2) + (-3)
y=4x +8 -3
y=4x + 5 (answer) Is this correct?
2. Find the equation of the line that contains the point (0,3) and is perpendicular to the line y=1/2X -1. My answer: y=-2x+1 Is this correct?
3. Find x intercept and y-intercept for the line with the equation y=4x + 1/2 and sketch the graph.
Y= 1/2
x= -2 Is this correct.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
1.Find an equation of a line that passes through the points (-2,-3) and (-1,1).
y=m(x-x1)+y1
y=4(x-(-2) + (-3)
y=4x +8 -3
y=4x + 5 (answer) Is this correct?
If you sub for x and y, both points satisfy the eqn, so it's correct.
---------------------------
2. Find the equation of the line that contains the point (0,3) and is perpendicular to the line y=1/2X -1.
My answer: y=-2x+1 Is this correct?
The point (0,3) isn't on the line, so it's not correct.
The slope, m, is -2
y-3 = -2x
y = -2x + 3
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3. Find x intercept and y-intercept for the line with the equation y=4x + 1/2 and sketch the graph.
Y= 1/2
is the y-intercept
--------------
--------------
x= -2 Is this correct.
---------------
x-intercept:
y = 0
0 = 4x + 1/2
x = -1/8

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