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a diagram shows the part of graph y=ax^2 which is a parabola , it also gives me the coordinates (-3,45) .How do i find the value of a ??

Sagot :

you plug in the x and y coordinates 45=a3^2
45=9a
divide 9 on both sides
a=5
Panoyinidn
  y = ax²
45 = a(-3)²
45 = a(9)
45 = 9a
 9      9
  5 = a
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