Understanding Constants in Linear Expressions

The video tutorial explains the linear expression 2x + 3, focusing on the role of the constant. It defines a constant as a standalone number without variables and identifies the constant in the expression as +3. The tutorial reviews multiple-choice answers, eliminating incorrect options and confirming that the constant adds three to the expression, making C the correct answer.

What is a constant in a linear expression?

• A number by itself with no variables

• A term that multiplies the variable

• A coefficient of the variable

• A variable that changes

In the expression 2x + 3, what role does the number 3 play?

• It multiplies the variable by 3

• It is a constant added to the expression

• It divides the expression by 3

• It subtracts 3 from the expression

Why can we eliminate option A when determining the effect of the constant?

• Because the constant is not multiplying the variable

• Because the constant is a variable

• Because the constant is a coefficient

• Because the constant is a divisor

What would the effect be if the constant was -3 instead of 3?

• It would multiply the expression by 3

• It would add 3 to the expression

• It would subtract 3 from the expression

• It would divide the expression by 3

Which option correctly describes the effect of the constant in the expression 2x + 3?

• It subtracts 3 from the expression

• It divides the expression by 2

• It adds 3 to the expression

• It multiplies the variable by 2

Why is option D incorrect when considering the effect of the constant?

• Because the constant is not negative

• Because the constant is a divisor

• Because the constant is a coefficient

• Because the constant is a variable