The black graph is the graph of y=f(x). Choose the equation for the red graph.
1 answer:
Answer:
d
Step-by-step explanation:
The red graph is an enlargement of the black graph.
Note coordinates of vertices of black graph to coordinates of red graph
(2, 2 ) → (2, 4 )
(4, - 2 ) → (4, - 4 )
(- 2, - 2 ) → (- 2, - 4 )
The y- coordinates of the red graph are twice the y- coordinates of the black graph.
and
= f(x) ← multiply both sides by 2
y = 2f(x) ← as required, thus
equation of red graph is
= f(x) → d
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Answer:
x = -2
Step-by-step explanation:
The tangent line has length "x + 8"
The secant line has length "x + 6 + 5", where
5 is the inner part
x + 6 is the outer part
Now,
the secant-tangent theorem tells us that square of the tangent line is equal to the outer segment of secant line multiplied by length of whole secant line.
So, we can say:
We can solve for x shown below:
The value of x is -2