The y-intercept of a line is where the line goes across the y line.
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Answer: The required value of f(3) is 81.
Step-by-step explanation: We are given the following function :

We are to find the value of f(3).
Substituting x = 3 in equation (i), we get

Thus, the required value of f(3) is 81.
Answer: (1, -5)
x = 1
y = -5
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Answer: draw a diagonal line
Step-by-step explanation:
like this:
since it's going up, it's a positive slope