Understanding the Concepts and Skills In Exercises, we identify the y-intercepts and slopes, respectively, of lines. For each line, determine whether it slopes upward, slopes downward, or is...

Understanding the Concepts and Skills

In Exercises, we identify the y-intercepts and slopes, respectively, of lines. For each line,

1. determine whether it slopes upward, slopes downward, or is horizontal, without graphing the equation.


2. find its equation.


3. use two points to graph the equation.

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