Algebra: Day 21
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20 Terms
Coordinate Plane
What is the first thing to do when graphing a point (x, y)?
Quadrants
Which quadrant contains (-, +)?
Slope Recognition
What does slope measure?
Slope Formula
How do you find slope from two points?
Special Slopes
What is the slope of a horizontal line?
Special Slopes
What is the slope of a vertical line?
Slope-Intercept Form
How do you recognize slope-intercept form?
Slope-Intercept Form
What do m and b represent?
Graphing Lines
How do you graph y = mx + b?
Method Selection
When should you rewrite an equation into y = mx + b?
Writing Equations
What is the first thing to identify before writing a line equation?
Point-Slope Form
When should you use point-slope form?
Point-Slope Formula
What is the point-slope formula?
Two-Point Method
What is the first step when given two points and asked for an equation?
Writing Equations
Write the equation through (2,5) with slope 3.
Graph Recognition
How do you write an equation from a graph?
Verification
How do you check a line equation?
Exam Trap
A student finds slope using (y₂-y₁)/(x₁-x₂). What went wrong?
Exam Trap
A student graphs y = -2x + 3 by going up 2 and right 1. What is wrong?
Exam Trap
A student writes y - 4 = 2(x + 3) for point (-3,4). Is it correct?