Algebra Linear Equations Quick Facts

1. Remember, to check feedback that I am
leaving you on every assignment:
• Grade Book
• Find the Mastery/Nonmastery and click
that “grade”
• Click Mastery/Nonmastery again
• Look below each question for feedback
if you had to answer yourself
• Look at the bottom of the top blue box
(header) if it was multiple choice

2. Quick facts for Linear
Equations
• If 0 is in the numerator,
then the slope is 0.
• If 0 is in the
denominator, then the
slope is Undefined.

3. Quick facts for Linear
Equations
• Horizontal lines are y = # ,
so you need use the y value
in (x, y)
• Vertical lines are x = # , so
you need use the x value in
(x, y)

4. Quick facts for Linear
Equations
• To find the y-intercept,
let x = 0. Solve for y.
• To find the x-intercept,
let y = 0. Solve for x.

5. Quick facts for Linear
Equations
• An x = # is parallel to an x = #
• A y = # is parallel to a y = #
• An x = # and y = # are
perpendicular

6. Quick facts for Linear
Equations
Point-Slope form
y – y1 = m(x –x1)
simplifies to
Slope-Intercept Form
(y = mx + b)