exam Maths Puzzle Numerical Ability

Graph the following including the axis of symmetry, identify the axis of symmetry, and create a suitable table of values x on one side and y on the other.
y = 2x^2

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exam Other Question

Need to solve equation 3x-1=5x-y and graph results.

This is my attempt:

3x-1-5x = 5x-y-5x
-2x-1 = -y, do I do anything else or is this the answer? Can someone help with this problem
Express as a single logarithm:
log a + log 1 - 2 log b - log c.