Multiple choice Which of the following expressions is a linear expression? – 4x – 7xy2 4x – 3y $\frac{4}{3}$ + $\frac{1}{x} + x$ x2 + 2 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The highest power of the term in the given expression is called degree. The expression having degree one is a linear expression. So, 4x – 3y is a linear expression.