ACT Math
Lesson Plan
Slope and equations of lines
Goals / Objectives
Determine the slope of a line from two points, using m = (y_2 - y_1)/(x_2 - x_1) with both subtractions in the same order, or from a graph by counting rise and run between two lattice points
State the sign and rough magnitude of a slope from a picture alone, and use it to check a computed slope
Derive from the formula that a horizontal line has slope 0 and a vertical line has undefined slope
Use equal slopes to decide whether three given points are collinear, and a slope product of -1 to locate a right angle in a figure given by vertices
Standards
G 510. Determine the slope of a line from points or a graph A 406. Exhibit knowledge of slope A 514. Determine the slope of a line from an equation AF 503. Match linear equations with their graphs in the coordinate plane G 606. Use properties of parallel and perpendicular lines to determine an equation of a line or coordinates of a point
Academic Vocabulary
Not in our source material
Materials
No slides or practice set for this standard yet
Remediation
Enrichment
This lesson’s brief has no Differentiation
Accommodations
Not in our source material
Anticipatory Set / Bell Work
This lesson’s brief has no Suggested Activities
Modeling
Check for Understanding
This lesson’s brief has no Formative Assessment or Assessment Ideas
Guided Practice
No slides or practice set for this standard yet
Independent Practice
No slides or practice set for this standard yet
Homework
Pacing
This lesson’s brief has no Pacing