exam Maths Puzzle Numerical Ability

Determine whether the graph of 2 equations are perpendicular.

y=3X-7
4Y=3-x

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exam Other Question

If I have two inequalities that have no solution:
x+5>10 and x-2<3 which results in x>5 and x<3 how do I graph this example and what is the solution using interval notation?
Th explain why y= 1*1 is not linear