Triangle XYZ is shown below with line AY passing through the center: Triangle XYZ is shown with line YA running vertically throu
gh the center of the figure. If triangle XYZ is dilated by a scale factor of four about the center of the triangle to create triangle X'Y'Z', dilated line Y'A' will
A) move four units to the left
B) be parallel to line YA and pass through point Z
C) be perpendicular to line YA and pass through point Y
D) pass through points Y and A
A) move four units to the left
B) be parallel to line YA and pass through point Z
C) be perpendicular to line YA and pass through point Y
D) pass through points Y and A
2 answers:
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Answer:
Step-by-step explanation:
The standard form of a quadratic is
where h is side to side movement (it's also the x coordinate of the vertex) and k is the up or down movement (it's also the y coordinate of the vertex). If there is no up or down movement, the k value is 0. (We don't need to worry about the value for a here; it's 1 but that doesn't change anything for us in our problem). Movement to the right is positive, so we are moving +10. Filling that into our equation:
and simplified:
That is the parent graph shifted 10 units to the right.