exam Maths Puzzle Numerical Ability

how do i graph this inequality?

(((y<-x^2+4)))

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exam Other Question

Given a line containing the points (1,4),(2,7),and(3,10) determine the slope-intercept form of the equation, provide one additional point on this line, and graph the function. How do you do find the area of triangles with these points: (3,4)
(-1,3) and (6,-2) ? here is what i have tried.
[[341]
[-131]
[6-21]]. after that i get stuck. can you guys pl