Page 199 - Algebra 1

*6. Verify Is the statement below true or false? Explain. (25)
The graph of a circle shows that the equation of the circle, x2 + y2 = 1 , is a function.
y
*7. Savings For every dollar Mirand deposits into her checking account, she deposits (30) 1.5 times as much into her savings account, which started with $50. So, s = 1.5c + 50, where s is the amount in savings and c is the amount deposited in checking.
Which graph represents this equation?
Graph 1 Graph 2
400
y
300
200
100
O
x
100
200
300
400
s
200
O
c
100
200
300
*8. Multiple Choice Which equation represents the line on the graph? (30) A y=x+10
B y-x=10 C -x=10+y D y=-x+10
*9. Multi-Step The table shows the total number of shrubs a gardener plants after each (30) half hour.
a. Plot these data on a coordinate grid.
b. Is the graph a function? Explain.
c. Predict Can you predict the number of shrubs the gardener will plant in 3 hours? Why or why not?
*10. Use the table to make a graph. Is the graph linear? Explain. (30)
Time (hours)
0.5
1
1.5
2
Number of Shrubs
1
3
7
8
x
0
1
2
3
y
4
7
10
13
184 Saxon Algebra 1
2
1
x
O
-2
-1
1
2
-1
-2
y
10 8
4
O
x
-4
4
8 10
-4