exam Maths Puzzle Numerical Ability

Can someone help me on this problem?

I had a problem I submitteed yesterday it was Graph 3x + y = 3

The tutor graphed it for me, but my instructor said i need to label my

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exam Other Question
2. Suppose y=100-5x and z=x(y-1)
Δy/Δx=?
∂z/∂x=?
∂z/∂y=?
Δz/Δx=? A navigator at point A observes the measure of the angle of elevation to the top of the cliff to be 19. This measure changes to 28 at point B. If the distance from A to B is 1500,