Solve for x.

Please help !

Step-by-step explanation:

Parallel lines divide transversals proportionally. I like to write the proportions so the variable is in the numerator. Then the solution is obtained by multiplying by the denominator of the variable term.

1. x/20 = (46 -16)/16

  x = 20(30/16)

  x = 37.5

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2. (x +4)/13.5 = 4/9

  x +4 = 13.5(4/9) = 6

  x = 6 -4

  x = 2

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)