Answer:
About 40 students are left handed
Step-by-step explanation:
Susana swam the fastest
2/3
1/3 x 2/1 = 2/3
The vertex is ( -4,1)
The equation for a parabola can be written as
y = a( x-h)^2 +k where ( h,k) is the vertex
y = 2 (x + 4)² + 1
Rewriting
y = 2 (x - -4)² + 1
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I just did it and got it right