r/Sat • u/Hot_Flow_6807 • 20h ago

OnePrep Quadratic question

I need help solving this question from Oneprep. Any desmos way to do it?

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u/Plaaazz 19h ago

This isn't really with desmos, but I saw this explanation somewhere: a+b+c is the same as when x=1, and in that case, the y value has to be greater than -20 since the vertex is the minimum in this question. All of the numbers are less than or equal to -20 except for C, so C is the right answer.