Surprise
What is the formula for slope?
y2-y1
x2-x1
or
rise
run
When do you add exponents?
when multiplying variables
What shape does the graph of a quadratic function called?
parabola
How do you calculate the mean?
Add up all the numbers and divide by how many there are
Is the sequence arithmetic or geometric?
16, 8, 4, 2, ...
geometric
Simplify
63cd
9bcd
7
b
Factor
x2+10x+21
(x+7)(x+3)
What is a line of best fit?
The line that best fits the data on a scatter plot
What is the common ratio?
16, 12, 9, 27/4,...
3/4
What is the formula for discriminant?
b2-4ac
What is the y-intercept of the function:
y=4(3)x
4
What is the axis of symmetry of
x2+7x-18
x= -7/2
Would the mean or median be better to represent the data below
2, 25, 26, 27, 28, 30
median
What is the 60th term in the arithmetic sequence?
4, 9, 14, 19, ...
299
Solve
2(y+4)+7y=26
y=2
Find the difference:
(3xy2 + x2 - 2x2y) - (6x2y - 4y + 5x2)
3xy2 + 4x2y - 4x2 + 4y
Factor the trinomial:
4x2 - 12x +2x - 6
(x-3)(4x+2)
What does a correlation coefficient of r= 1 mean?
the data of a scatter plot line up in a straight line with a positive slope
Find the 10th term of the sequence
4, 20, 100, 500, ...
7,812,500
Rewrite the equation of the line below in slope intercept form:
-2x+3y=-5
y=2/3x-5/3
Find the product
(x+2)(3x-7)
3x2 - x - 14
What is the solution of the quadratic equation:
x2+3x-8
-3 + sqrt(41)
2
-3 - sqrt(41)
2
The monthly rents (in dollars) are paid by 7 people.
880, 975, 990, 1005, 1040, 1065, 1080
Suppose that one of the people moves. Their rent changes from 1080 to 1010. What happens to the median?
Nothing, it is still 1005.
What is the formula for an explicit arithmetic sequence
an=a1+d(n-1)