Please help me with 20 and 21 pleas

Explain the answer and how to do it

Solve the following inequalities and show the solution on a number line. 3/4 (2x-7) ≤ 5

Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1