In the xy-plane, at what two points does the graph of y = (x + a)(x + b) intersect the x-axis?

In the xy-plane, at what two points does the graph of y = (x + a)(x + b) intersect the x-axis?

(1) a + b = -1

(2) The graph intersects the y-axis at (0, -6)

Correct Answer: C

Additional GMAT coordinate plane geometry questions!

Here’s a GMAT coordinate plane question that’s a bit harder than the above. It is a DS yes/no question and has a bunch of algebra to analyze. Don’t get caught up in treating everything that has a geometry element as a geometry question!

In the xy-plane, does the line with equation y = 3x + 2 contain the point (r,s)?

And another whopper of a coordinate plane question! Once again: yes/no + a bunch of algebra to look at.

In the xy-plane, region R consists of all the points (x,y) such that 2x + 3y ≤ 6. Is the point (r,s) in region R?

Lastly, here’s a more nuts and bolts coordinate plane geometry question from GMAT question of the day.

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