Topic 1
Is the number 0.375 rational or irrational?
Rational.
0.375 is a terminating decimal, so it can be written as a fraction (3/8).
Solve For X
3x+7−2x=10
x=3
Is the Following a Function?
{(1,2),(2,3),(3,4),(2,5)}
Not a function.
Does the scenario have a positive or negative correlation?
Number of hours spent studying and test scores
Positive Correlation
What axis can you find the initial value?
Y Axis
Determine whether √16 and √20 are rational or irrational.
√16 is rational because it equals 4.
√20 is irrational because 20 is not a perfect square.
Solve For X
2(x+4)=18
x=5
A function is represented by the table below. Write an equation that models the function.
x= 1 2 3 4
y= 3 5 7 9
NOTE - FOR THE TABLE, LOOK UP AND DOWN FOR THE PAIRS. for example the first pair is (1,3)
y=2x+1
The ordered pairs (1,2),(2,4),(3,5),(4,8)
Do they have a positive association or a negative association?
Positive Association
What is an interval?
A period of time between two points of time or events
Between which two consecutive integers does √10 lie?
Between 3 and 4
Determine if the equation has one solution, no solution, or infinitely many solutions:
4(x−1)=4x+2
No solution!
−4=2
Is This A Function?
{(3, 2) (2, 3) (3, 6) (2, 5)}
No.
Identify the type of association shown in the scatter plot description below:
As the value of x increases, the value of y decreases.
Negative Association
Is non linear a straight line?
No.
Order the following numbers from least to greatest:
√5, 2.1, 9/4
2.1, √5, 9/4
The line y=3x-7 represents a linear equation.
What is the y-intercept?
y-intercept: −7
A phone plan costs $30 a month plus $0.10 per text message.
Write a function to model the total monthly cost (C) as a function of the number of texts (t).
C=0.10t+30
Which situation shows the strongest linear association?
A. Points are tightly clustered around a straight line
B. Points are spread randomly
C. Points form a curved pattern
A. Points are tightly clustered around a straight line
A graph with points plotted to show a possible relationship between two sets of data.
Scatter Plot
Which of the following numbers are irrational? Select all that apply and justify your choices.
√49
√2
0.121121112…
5/7
√2
0.121121112…
Write an equation of the line in slope-intercept form that passes through the point (2,5) and has a slope of 3.
y=3x−1
Table: {(1, 2), (2, 4), (1, 3)}
Is this a function?
No.
The equation gives a line of fit for a scatter plot
y=2x+1
Use the model to predict the value of y when x=6
y=13
Data obtained by measuring objects or events
Measurement Data