Poptarts1512
Poptarts1512 Poptarts1512
  • 22-04-2021
  • Mathematics
contestada

If a varies directly with x squared, and a = 8 when x = 4 find the constant variation of k

Respuesta :

jimrgrant1 jimrgrant1
  • 22-04-2021

Answer:

k = 0.5

Step-by-step explanation:

Given a varies directly with x² then the equation relating them is

a = kx² ( k is the constant of variation )

To find k use the condition a = 8 when x = 4 , then

8 = k × 4² = 16k ( divide both sides by 16 )

0.5 = k

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