PSAT Math Review
Slope Equation - Correct Answers-slope = rise/run
Slopes of Lines Parallel to Y-Axis - Correct Answers-m = Undefined, as the lines exist but can't be
numerically calculated
Slopes of Lines Parallel to X-Axis - Correct Answers-m = 0
Y-Intercept Definition - Correct Answers-The value where the model begins or where the graph
crosses the y-axis
Systems of Equations Definition - Correct Answers-Set of multiple equations with multiple
variables that are interdependent
Useful for modeling and simulaion
When the systems of equations gives an answer like 6=6 or 4=4, then the equations are... -
Correct Answers-infinite solutions
When your system has no solution, it will graph as... - Correct Answers-Two parallel lines
When your system has one solution, it will graph as... - Correct Answers-Two lines that intersect
at a single point
When your system has infinite solutions, it will graph as... - Correct Answers-Two lines that
overlap, making one
Ways to solve Systems of Equations - Correct Answers-Substitution
Elimination
Graphing
Substitution Method - Correct Answers-Solve the simpler of the two equations for one variable
and then substitute the result into the other variable
r = 2x + 6
3r + 2x = 18
6x + 18 + 2x = 18
Elimination Method - Correct Answers-Adding the two equations together to eliminate a
Slope Equation - Correct Answers-slope = rise/run
Slopes of Lines Parallel to Y-Axis - Correct Answers-m = Undefined, as the lines exist but can't be
numerically calculated
Slopes of Lines Parallel to X-Axis - Correct Answers-m = 0
Y-Intercept Definition - Correct Answers-The value where the model begins or where the graph
crosses the y-axis
Systems of Equations Definition - Correct Answers-Set of multiple equations with multiple
variables that are interdependent
Useful for modeling and simulaion
When the systems of equations gives an answer like 6=6 or 4=4, then the equations are... -
Correct Answers-infinite solutions
When your system has no solution, it will graph as... - Correct Answers-Two parallel lines
When your system has one solution, it will graph as... - Correct Answers-Two lines that intersect
at a single point
When your system has infinite solutions, it will graph as... - Correct Answers-Two lines that
overlap, making one
Ways to solve Systems of Equations - Correct Answers-Substitution
Elimination
Graphing
Substitution Method - Correct Answers-Solve the simpler of the two equations for one variable
and then substitute the result into the other variable
r = 2x + 6
3r + 2x = 18
6x + 18 + 2x = 18
Elimination Method - Correct Answers-Adding the two equations together to eliminate a
