Most of it is from the last unit, though there is one 1-variable equation for you to solve and one "age" problem (both from unit 2).
The concepts are as follows:
writing a linear equation based on information - 3
finding a solution to a system - 6
verifying a point is on a graph - 2
understanding the slopes of parallel lines - 1
collinearity - 1 (see pg. 344)
scatterplot - 1 (see pg. 409-410)
line of best fit - 1
linear inequality - 1
Here are some problems you can work on:
1. Write the equation that describes each line.
a) slope = 4;
y-intercept = – 1
c) slope =
–1/2 ; ( 14, – 8 ) d) ( 2, 6 ) & ( – 1, – 3 )
2. Write an equation in slope –
intercept form for the line that passes through ( 3, 4 ) and is
parallel to y = – 2x + 3.
3. Solve each system. a) x+y=2 2x-y=7
b) y=x-4 y = -x+2
c) x= 1-6y 2x - 3y = 32
4. Christina has some quarters and dimes.
There are 40 coins altogether and the
total value of the coins is $6.40. How many quarters and how many dimes
does
she have?
5. Solve each equation.
a) 12x
– 3 +
x = 23 b) – 8 = 4
( x
+ 2 )
c) 3/4 ( 8x – 4 ) + 3 = 5
6. 1. Mr. Russell loves his chili
night. He makes 2 kinds. The first has 3 cans of beans and 2 cans of
tomatoes, which costs $10.50. The second
has 1 can of beans and 4 cans of tomatoes but costs $14.50. How much does each can of produce cost?
7 Show all solutions to: y is "less than" 2x-3
8. Write an equation for a vertical line.
9. Tell whether the ordered pair is a solution
of the given system. Show your work.
x + 3y = 6 and 4x –
5y = 7 point (3,1)
10. Write an equation in slope –
intercept form for the line that passes through ( 3, 4 ) and is
parallel to y = – 2x + 3.
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