Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has
a steep upward hill. Janice moves more slowly as she skates up the hill.
Which graph shows Janice's position as she roller skates away from her house?
A. Z
B. X
C. W
D. Y
Which graph shows Janice's position as she roller skates away from her house?
A. Z
B. X
C. W
D. Y
2 answers:
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Answer:
D
Step-by-step explanation:
The formula we need to solve this is:
Where
is the distance from one focus to the vertex
is the second distance from another focus to same vertex
<u>Note:</u> Here, vertex point is the point on top. The common point from which the RED and BLUE line meets the 2 foci
is half the length of the major axis (which is 9 here since total major axis is given as 18)
<em>Now we can plug into the equation and solve:</em>
<em></em>
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<em>D is the correct answer.</em>