Which equation shows Direct Variation?
A. y=1/4⋅ x
B. 1/4 ⋅ y= 1/x
C. y= 1/4-x
A. y= 1/4⋅x
What are the factors of the following equation?
y= x2+6x+8
(x+2) (x+4)
5x+5>45
x>8
What is system of equations?
A group of equations that you'd deal with all together.
Using the data shown what would be the line of best fit?
(12,6), (18,9), (20,10), (30,15), (16, 8)
Which variation's lines do NOT pass through the origin?
A. Direct Variation
B. Inverse Variation
C. Polynomial Variation
D. Quadratics Variation
B. Inverse Variation
Where do you find the Solutions in a Quadratic Equation?
A. y - Intercept
B. x - axis
C. x - Intercept
D. y - axis
B. x-axis
Is the following true?
4x ≤12 = x ≤3
Yes
What method do you have to make variable to have the same coefficient so you can get rid of them?
Elimination Method
what information is shown on a Box and Whisker Plot?
Median, Upper extreme, Upper Quartile, Lower Quartile, lowest extreme.
Direct Variation
What are the Zeros of the equation,
y=x2 -2x-3? When the factors are (x+1) and (x-3)
x=-1 x=3
Is a greater than or equal to symbols line solid or dotted?
Solid
When doing the substitution method what do you have to do?
Make an equation either equal x or y and then substitute that equation into the second one and solve. Be careful when finding the right variable.
18, 12, 22, 28, 32
12
What is the Inverse Variation formula?
y=k/x
If the solutions of an equations are x=-4 and x=10,
what are the factors?
(x+4) and (x-10)
Where is a solution on the graph when both inequalities have dotted lines?
Where both regions are shaded.
What methods are used in System of Equations
Elimination, Substitution, graphing
what are the percentages between each data on a Box and Whisker Plot.
Ex: Between Lower Quartile and the median
25%
(4x+3) (7x-5)
28x2+x-15
What are the factors of this equation,
y=2x2-7x+3
Why would you have to flip your sign?
When dividing a negative number on both sides.
What method would be best for solving the following:
3x+9y=12
x=3+12
Substitution
is the line when finding line of best fit always straight
No