Transcript Some Algebra Review

Some Algebra Review
By: Mrs. Brown
Functions and Relations
Which relation is NOT a function?
Functions and Relations
(Continued) Which relation is NOT a
function?
C is not a function.
Linear Equations,Tables/Equations
Which equation matches the coordinates
given in the table below?
When looking at the
table you should notice
A. y = 2x
that y is always three
times as large as x, so:
B. y = 3x
Y= 3x
C. y = x+4
To solve:
D. y = x+6

B. y = 3x
Write the original
equation, substitute 2
for x and 6 for y.
Simplify. Try at least
two of the coordinates
to see if the ordered
pair is a solution.
x- and y- Intercepts
•
A.
B.
C.
D.
Which set of ordered pairs represents the xintercept and y-intercept of the graph of y =
2x – 12?
Equation: y= 2x - 12
(6,0) and (0,12)
(6,0) and (0,-12)
(-6,0) and (0,12)
(-6,0) and (0,-12)
B. (6,0) and (0,-12)
Substitute each coordinate until you find true
Solutions for each.
(x,y)
(0,-12)
(6,0)
y = 2x - 12
y = 2x - 12
0 = 2(6) - 12
-12 = 2(0) - 12
0 = 12 - 12
-12 = 0 - 12
0=0
-12 = -12
Slope
What is the slope of the line that contains
points (-3,-5) and (2,7)?
A.
B.
C.
D.
-2
-½
5/12
12/5
D. 12/5
Slope: The ratio of the vertical
rise to the horizontal run.
Slope = rise/run
Linear Equations - Graphs
 Which of the following graphs
represents the equation:
Hint: Substitute coordinates into the equation to see if the
solution is true. Try at least two pairs on each graph!
Linear Equations - Graphs
(0,-4)
-4 = 3/2(0)
-4 ≠ 0
False
Linear Equations - Graphs
(-4,-2)
-2 = 3/2(-4) - 4
-2 = -6 - 4
-2 ≠-10
False
Linear Equations - Graphs
(-4,-2)
-2 = 3/2(-4) - 4
-2 = -6 - 4
-2 ≠-10
False
Linear Equations - Graphs
(4,2)
2 = 3/2(4) - 4
2 = 6 -4
2=2
True
D. Correct answer