*percent error: amount of error (find the difference) divided by the actual amount.
*Circumference = pi times the diameter or 2 times the radius times pi. *Area of circle = pi times the radius squared *Types of graphs and when to use them: Bar Graph - categories Box plot - lots of data, to show variation Cirlce Graph - % Histogram - intervals, like 1-5 and 6-10 Line Graph - changes over time Line Plot - number line *Algebra steps: Remember ultimate goal - get the variable alone. First, move the constant (number without a letter) by either adding or subtracting. Then, move the coefficient (number right next to the letter) by multiplying or dividing.
*Triangles: Sum of angles in a triangle is 180 degrees. The sum of any two sides must greater than the 3rd side. The category names for the sides of triangles: scalene (none the same), isosceles (two sides the same), and equilateral (all sides the same). The category names for the angles of triangles: acute, obtuse, and right. *Combining like terms: Remember you can only combine terms that match exactly (same letter, or no letter) *Integer rules: Remember, subtracting is adding a negative. Adding: if they have the same sign, add like normal and keep the sign. If they have different signs, find the difference, keep the sign of the bigger number. Multiplying/dividing: positive times a positive is positive (+*+=+), negative times a negative is positive (-*-=+). Negative times positive is negative(-*+=-), positive times negative is negative (+*-=-). *Unbiased samples = equal representation: simple random sample, systematic random sample Biased samples = uneven representation: convenience sample, voluntary response |
AuthorI thought this would be a great spot to put the daily notes, so if you ever miss, or don't understand, you can check here. Archives
May 2018
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