Question

find the x-intercept of the line y = 7x - 21. write your answer as an integer or as a simplified proper or improper fraction, not as an ordered pair.

Explanation:

Step1: Recall x-intercept definition

The x-intercept is where \( y = 0 \), so set \( y = 0 \) in the equation \( y = 7x - 21 \).
\( 0 = 7x - 21 \)

Step2: Solve for x

Add 21 to both sides: \( 7x = 21 \).
Divide both sides by 7: \( x=\frac{21}{7}=3 \).

Answer:

3