Intercepts and the CoverUp Method
Key Questions

Answer:
#color(blue)("Horizontal line " x = a# #color(purple)("Vertical line " y = b# Explanation:
Refer table above.
#"Equation of a line in" color(red)("Intercept Form") "is given by"# #x / a + y / b = 1, " where a in xintercept and b the yintercept"# For a horizontal line, y = 0 or y/b = 0 and the equation becomes,
#x / a = 1 " or " x = a# Similarly, for a vertical line, x = 0 or x / a = 0 and the equation becomes,
#y / b = 1 " or " y = b# 
I suppose that "coverup" is a friendlier term for "setting a variable equal to zero," so if you are looking for the
#x# intercept of a line, then set#y# equal to zero, and for#y# intercept, set#x# equal to zero.
Example
Let us find the
#x,y# intercepts of the line#2x+3y=12# .To find the
#x# intercept, set#y=0# .#=> 2x+3(0)=12 => 2x=12 => x=6# So, the
#x# intercept is#6# .To find the
#y# intercept, set#x=0# .#=> 2(0)+3y=12 => 3y=12 => y=4# So, the
#y# intercept is#4# .
I hope that this was helpful.
Questions
Graphs of Linear Equations and Functions

Graphs in the Coordinate Plane

Graphs of Linear Equations

Horizontal and Vertical Line Graphs

Applications of Linear Graphs

Intercepts by Substitution

Intercepts and the CoverUp Method

Slope

Rates of Change

SlopeIntercept Form

Graphs Using SlopeIntercept Form

Direct Variation

Applications Using Direct Variation

Function Notation and Linear Functions

Graphs of Linear Functions

Problem Solving with Linear Graphs