Question

Identify a linear expression from the following.

• A. 4z+7 = 9
• B. 3y+2
• C. $x^2$+ 9
• D. x = 9

Answer 1

The correct option is B 3y+2

A linear expression in is an expression in which the highest degree of the variable is one.

Here, 4z+7 = 9 and x = 9 has a equal to sign (=) in it. Therefore, they are equations but not expressions.

$x^2$+ 9 is an expression but the varaible yx has degree two. So, it is not an linear expression.

3y + 2 is a linear expression where y is the variable and has degree one.