exam Maths Puzzle Numerical Ability

If you have l(1) with equation x-3y=6 L2 with equation 3x+y=3

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exam Other Question

I have no clue if finding the rate of change goes in this section:

The question says,

find the rate of change for each situation.

-Reading 5 pages in 6 minutes and 22 page What does it mean when it says "find the quadratic equation where f(1)=2 and the maximum value of f is f(3)=-5"?