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
01Explain what a slope means in a word problem, with its unitsDescribe the slope in words as how much y changes each time x goes up by one, using the units the problem gives.
02Tell whether a line rises or falls from the sign of its slopeCheck the slope’s sign: positive means the line rises from left to right, and negative means it falls.
03Find the slope between two points without a sign errorSubtract the y-values and the x-values in the same order, then divide the difference in y by the difference in x.
04Find a slope in Desmos when the coordinates are messyType the two points in Desmos, then type the difference of their y-values over the difference of their x-values on a new line.
This lesson is part of the full library
207 lessons that teach every skill the SAT tests
71Math
40Reading
24Grammar
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A step-by-step guide to every practice test question
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