Ch.3TestReview.notes

```Algebra I and Concepts
Ch. 3 Test Review
Directions
1) Get out a piece of paper, put your name and
“Ch. 3 Test Review” at the top
2) As each slide appears, work through the
problems shown. You may not finish them all,
that is ok! Don’t rush, work through what you
can.
3) When the answer slide is posted, check your
questions if necessary.
4) Finish any questions by looking up the review on
my website
5) This will be turn in on MONDAY with your
homework
Find the missing value
Find the value of r so that the line passes
through the set of points and has the given
slope
1) (r, -5), (3, 13), m = 8 2) (-2, 6), (r, -4), m = -5
Find the missing value
Find the value of r so that the line passes through
the set of points and has the given slope
1) (r, -5), (3, 13), m = 8 2) (-2, 6), (r, -4), m = -5
r = 0.75
r=0
-5 -13
=8
r -3
-18 = 8(r - 3)
-18 = 8r - 24
6 - -4
= -5
-2 - r
10 = -5(-2 - r)
10 = 10 + 5r
6 = 8r
0 = 5r
0.75 = r
0=r
Is the graph a function?
1)
2)
3)
4)
Is the graph a function?
1)
YES
2)
NO
3)
YES
4)
NO
Find the x and y intercepts of the
following equations
1) -5x + 8y = -40
2) x – 3y = 15
Find the x and y intercepts of the
following equations
1) -5x + 8y = -40
X-int: (8, 0)
Y-int: (0, -5)
2) x – 3y = 15
x-int: (15, 0)
y-int: (0, -5)
Given two functions, determine any
similarities and differences of their graphs.
(Hint: Use cover-up to graph)
1) 3x – 4y = 12
2) -x – 3y = 9
Given two functions, determine any
similarities and differences of their graphs.
(Hint: Use cover-up to graph)
1) 3x – 4y = 12
2) -x – 3y = 9
• One slope is positive, one is negative
• They have the same y-intercept
Find the slope of the line through the 2 points,
then use the slope to classify the line as,
horizontal, vertical, or oblique
1) (-3, 7) (-3, 4)
2) (-4, 3), (-2, 1)
3) (5, 2), (-6, 2)
Find the slope of the line through the 2 points,
then use the slope to classify the line as,
horizontal, vertical, or oblique
1) (-3, 7) (-3, 4)
Slope: undefined
Vertical Line
2) (-4, 3), (-2, 1)
Slope: -1
Oblique
3) (5, 2), (-6, 2)
Slope: 0
Horizontal Line
Word Problems!
1) In 2000, the cost of in-state tuition at Mizzou
was \$9,000 a year. In 2013 the cost of in-state
tuition is \$21,000. Find the rate of change.
2) Mrs. Huseman drives 45 miles to work and it
takes her 40 minutes. If she maintains that same
speed, how long will it take her to drive 105
miles?
Word Problems!
1) In 2000, the cost of in-state tuition at Mizzou
was \$9,000 a year. In 2013 the cost of in-state
tuition is \$21,000. Find the rate of change.
Increasing \$923.07 per year
2) Mrs. Huseman drives 45 miles to work and it
takes her 40 minutes. If she maintains that same
speed, how long will it take her to drive 105 miles?
93.3 min or 1.55 hours
Complete the problems:
The following table represents a
linear function. Fill it in and
identify the x and y intercepts
X
Y
-2
12
-1
8
0
1
2
Graph the line if the x intercept
is 5, and the y-intercept is -3
Complete the problems:
The following table represents a
linear function. Fill it in and
identify the x and y intercepts
X
Y
-2
12
-1
8
0
4
1
0
2
-4
X-int: (1,0)
Y-int: (0, 4)
Graph the line if the x intercept
is 5, and the y-intercept is -3
Graph the following equations
1) y = -2
2) y = -x + 4
3) 2x – y = 8
4) x = 5
Graph the following equations
1) y = -2
2) y = -x + 4
3) 2x – y = 8
4) x = 5
Evaluate the function for f(1), f(-3),
and f(5), then graph the points
f(x) = -2x + 3
Evaluate the function for f(1), f(-3),
and f(5), then graph the points
f(x) = -2x + 3
-2(1) + 3 = 1
f(1) = 1
-2(-3) + 3 = 9
f(-3) = 9
-2(5) + 3 = -7
f(5) = -7
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