To find the parent function of a linear equation, you need to first identify the slope and y-intercept of the equation. The slope is the number that is in front of the x variable, and the y-intercept is the number that is by itself on the right side of the equal sign. Once you have these two numbers, you can plug them into the standard form of a linear equation, which is:
y = mx + b
where m is the slope and b is the y-intercept. This will give you the parent function for a linear equation.