14. Is 0.8x = 0.5y-2 a direct variation? If it is, find the constant of variation.
yes; k = 0.625
yes; k = 1.6
yes; k = 2.5
no

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

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