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Step-by-step explanation:

cross A and D stay with B and C lets take a look at all B and C

the week = X and amount = Y

linear function: refers to two distinct but related notions: In calculus and related areas, a linear function is a function whose graph is a straight line, that is, a polynomial function of degree zero or one

exponential function: is a function of the form {\displaystyle f(x)=ab^{x}, } where b is a positive real number, and the argument x occurs as an exponent

problem:

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

f(5/2) = 10/3

i hope this !