exam Maths Puzzle Numerical Ability

what is the slope of the line that bisects the 90 degrees angle betweeb the +x and +y axes? between the -x and +y axes?

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exam Other Question

Describe the change in y values as you move along the line from left to right across the coordinate plane. Find the slope and y-intercept. 9y=36x+72 How do you factor this trinomial----------------------------------------------
{{{{x^2+30x+216=0}}}
Thanks so much!