△ABC is reflected to form △A'B'C' .
2 answers:
Answer:
Option B.
Step-by-step explanation:
It is given that △ABC is reflected to form △A'B'C' .
It is given that the vertices of triangle ABC are A(4,1), B(6,3) and C(2,4).
From the given figure it is clear that vertices of triangle A'B'C' are A'(-4,1), B'(-6,3) and C(-2,4).
The relation between preimage and image is defined by the rule
Reflection across y-axis represented by the above rule.
It means the △ABC is reflected across the y-axis to form △A'B'C' .
Therefore, the correct option is B.
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y = - 3
Since y varies directly as x then
y = kx ← ( k is the constant of variation )
to find k use y = - 1 when x = 3
k = =
= -
hence y = - x
when x = 9, then
y = - × 9 = - 3