Laura has a rain gauge outside her house. It holds 21 ounces of water. As the rain started to fall, her gauge filled up with water. When the rain was gone, the gauge was 75% filled. Approximately how many ounces of water fell at Laura's house?

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0 

The answe i think is 23

Anever would be answer