slopeFor a nonvertical line, slope is the change in y divided by the change in x: y’s change per unit of x. A vertical line has undefined slope.
You’ll leave with these skills
01Find which point solves a system of two inequalitiesGraph both inequalities in Desmos and pick the answer choice that sits where the two shaded regions overlap.
02Find the greatest y-coordinate a system of two inequalities allowsClick the corner where the two boundary lines cross, then check the whole numbers next to it in both inequalities.
03Find a model’s greatest output when only some x-values are allowedType the allowed x-values in braces after the equation, then click the highest point of the part of the graph Desmos draws.
04Tell when substituting the answer choices beats graphing themPut each answer choice’s x- and y-values into the inequality and see which ones make it true.
This lesson is part of the full library
207 lessons that teach every skill the SAT tests
71Math
40Reading
24Grammar
10 full-length practice tests to build test-day stamina and confidence
A Desmos simulator to solve math questions faster
A step-by-step guide to every practice test question
The Bluebook Simulator, so test day feels familiar
A drawing for every key term, so new ideas make sense at a glance
