Answer
$2023$
Work Step by Step
Substituting $y=700$ in the given equation, $
y=13.34x+5.36
,$ results to
\begin{array}{l}\require{cancel}
700=13.34x+5.36
\\
700-5.36=13.34x
\\
694.64=13.34x
\\
\dfrac{694.64}{13.34}=x
\\
x=52.071964017991004497751124437781
.\end{array}
Rounded up, then $x=53.$ Hence, the restaurant sales will exceed $\$700$ billion $53$ years after $1970$ or in the year $
2023
.$