Numbers
True or False: -6 > 2
False!
Which symbols can be used instead of > to make this a true statement?
Label the x- and y-axes on the back of the whiteboard!
The x-axis is horizontal; the y-axis is vertical.
What do we call the point where the two axes intersect?
Can we add 4a+4b? Why or why not?
No, these are not like terms!
What are the criteria for like terms (there's two)?
What is the mode of the set 14, 88, 72, 9, 9, 14, 9, 23?
It's 9 because this number appears more than any other value in this data set.
What would the mode be if there were also three 14s in the set?
How many modules are on the math section of the SAT?
2
4/5 + 3/5
7/5
What is the term we use to describe the identical numbers on the bottom of these fractions, and why are they so important in this problem?
Plot the point (-4, 3).
Ms. Levy will draw the point on the board.
Which quadrant is this point in?
Simplify -4(n+5)
*Remember that this is an expression, not an equation (there's no = in it), so our goal is not to solve to find the value of n. Your answer should have n in it!
-4n-20
What would change if the problem were -4(n-5)?
What's the step-by-step process for calculating the median of a data set?
1. Put the data points in order from least to greatest.
2. Cross out numbers on each side (one from the left and one from the right) until you reach the middle.
3. The number in the middle represents the median.
What if there are an even number of data points and there are two numbers in the middle?
How much time do you have to complete each module of the math section.
35 minutes per module (70 total minutes for math)
Is the answer to (-10)*457*(-12)*(-3) a positive or negative number?
It'll be negative!
What are the rules for multiplying positive and negative integers?
What are the slope and y-intercept of the equation y=-x+1?
What kind of equation is y=-x+1 (linear, quadratic, piecewise, or exponential)? How do you know?
Solve the following equation to find the value of m:
2m+5=15
m=5
What is the word we use for numbers that we represent with letters or symbols? m is one of these.
Find the mean of this data set:
5, 20, 18, 11, 4
11.6
What's another word we use in place of mean?
Hint: It starts with an "a".
True or False: You can use Desmos on the SAT.
True. Please use it!!!
(1/7)/(2/3)
3/14
What is the rule for dividing fractions called?
Graph y=3x-2
Ms. Levy will plot the answer on the board.
Looking ahead: What would this equation look like if we reflected it over the y-axis?
Solve the equation 5a-2=2a+4 for a.
a=2
Does it matter if we deal with the constant terms or variable terms first? Why or why not?
What is the probability that a six-sided die will roll a 4 or 5?
1/3
Is rolling a die multiple times an example of dependent or independent events?
True or False: I can keep my phone in my bag or pocket as long as I silence it or turn it off.
False. You must place your phone in an envelope, where it will stay for the entire exam. You must also remove any earbuds/headphones, smartwatches, and other smart devices.
What do the numbers 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100 all have in common?
They are all perfect squares!
Can a perfect square be negative?
Graph y=-1+x2
Ms. Levy will demonstrate on the board.
What is the factored form of this equation?
Solve the equation for b: 13=-3+b2
b=-4,4
Why are there two possible answers for this question? Are we able to say for sure that the value of b is one number or the other?
What does standard deviation measure?
Standard deviation is a measure of variation, or how spread out a set of data points is.
What Greek letter do we use to represent standard deviation?
True or False: I can only take the SAT once.
False! You can retake the SAT as many times as you want, and colleges and universities will only see the scores that you choose to send them. Do your best tomorrow, but know that you can always retake it. :)