Lesson 11
Perpendicular Lines in the Plane
- Let’s analyze the slopes of perpendicular lines.
Problem 1
Write an equation for a line that passes through the origin and is perpendicular to \(y=5x-2\).
Problem 2
Match each line with a perpendicular line.
Problem 3
The rule \((x,y)\rightarrow (y,\text-x)\) takes a line to a perpendicular line. Select all the rules that take a line to a perpendicular line.
\((x,y)\rightarrow (2y,\text-x)\)
\((x,y)\rightarrow (\text-y,\text-x)\)
\((x,y)\rightarrow(\text-y,x)\)
\((x,y)\rightarrow(0.5y,\text-2x)\)
\((x,y)\rightarrow(4y,\text-4x)\)
Problem 4
- Write an equation of the line with \(x\)-intercept \((3,0)\) and \(y\)-intercept \((0,\text-4)\).
- Write an equation of a line parallel to the line \(y-5=\frac43(x-2)\).
Problem 5
Lines \(\ell\) and \(p\) are parallel. Select all true statements.
Triangle \(ADB\) is similar to triangle \(CEF\).
Triangle \(ADB\) is congruent to triangle \(CEF\).
The slope of line \(\ell\) is equal to the slope of line \(p\).
\(\sin(A) = \sin(C)\)
\(\sin(B) = \cos(C)\)
Problem 6
Select the equation that states \((x,y)\) is the same distance from \((0,5)\) as it is from the line \(y=\text-3\).
\(x^2+(y+5)^2=(y+3)^2\)
\(x^2+(y-5)^2=(y+3)^2\)
\(x^2+(y+5)^2=(y-3)^2\)
\(x^2+(y-5)^2=(y-3)^2\)
Problem 7
Select all equations that represent the graph shown.
\(y=\text-x + 2\)
\((y-3) =\text-(x+1)\)
\((y-3) =\text-x-1\)
\((y-3) = (x-1)\)
\((y+1) =\text-(x-3)\)
Problem 8
Write a rule that describes this transformation.
original figure | image |
---|---|
\((3,2)\) | \((6,4)\) |
\((4,\text-1)\) | \((8,\text-2)\) |
\((5,1)\) | \((10,2)\) |
\((7,3)\) | \((14,6)\) |