Practice problem

Stretch or Compress Function Vertically: cf(x)

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Which of the following tables show a vertical stretch of the function represented in this table:

\begin{array}{|l|l|} \hline x&0&1&2&3&4&5&6&7&8&9\\ \hline f(x)&1&3&5&7&9&11&13&15&17&19\\ \hline \end{array}

Choose all correct answers

\begin{array}{|l|l|} \hline x&0&1&2&3&4&5&6&7&8&9\\ \hline f(x)&-2&-6&-10&-14&-18&-22&-26&-30&-34&-38\\ \hline \end{array}

\begin{array}{|l|l|} \hline x&0&1&2&3&4&5&6&7&8&9\\ \hline f(x)&2&6&10&14&18&22&26&30&34&38\\ \hline \end{array}

\begin{array}{|l|l|} \hline x&0&1&2&3&4&5&6&7&8&9\\ \hline f(x)&5&15&25&25&45&55&65&75&85&95\\ \hline \end{array}

\begin{array}{|l|l|} \hline x&0&1&2&3&4&5&6&7&8&9\\ \hline f(x)&\frac{1}{5}&\frac{3}{5}&1&\frac{7}{5}&\frac{9}{5}&\frac{11}{5}&\frac{13}{5}&3&\frac{17}{5}&\frac{19}{5}\\ \hline \end{array}