| answers: b a
a a c b a c c
|
| 3.7
|
|
|
1. Write a point-slope equation that
has the given point and slope:
m = -2 and (-3, 17)
|
| ay
+ 2 = 3(x + 17) |
| by
- 17 = -2(x + 3) |
| cy
- 17 = 2(x - 3) |
| dnone
of the above |
| 2. The previous answer can also be written
in slope-intercept form as
|
|
ay = -2x
+ 11 |
|
by = 2x +11 |
|
cy = - 2x -
22 |
|
dnota |
| 7.1 |
| 3. Does this ordered pair satisfy the
system of equations ?? (1/2,1/2) for b - a = 0 and b
+ a = 1 |
|
a yes |
|
bno |
|
cnota |
|
d |
| 7.2
|
4. Solve be substitution:
y = x + 3
3x + y = 15
The solution for x lies between
|
|
a 0 and 4 |
|
b4 and 8
|
|
c8 and 12 |
|
dnota |
| 5. In the previous problem, the solution
for y is |
|
a2 |
|
b4 |
|
c6 |
|
dnota
|
6. Solve by substitution:
x - y = 2
x + y = -2
The solution for y is |
|
a0 |
|
b-2
|
|
c2 |
|
dnota |
| 7. In the previous problem, the solution
for x is |
|
a0 |
|
b3 |
|
c6 |
|
dnota |
| More 3.7 practice |
8. Write a point-slope equation that
has the given point and slope:
m = 2 and (3, -17) |
a
y
+ 2 = 3(x + 17) |
b
y
+ 17 = -2(x - 3) |
c
y
+ 17 = 2(x - 3) |
|
dnota |
| 9. The previous answer can also be
written in slope-intercept form as: |
|
ay = -2x
+ 11 |
|
by = 2x +
11 |
|
cy = 2x -
23 |
|
dnota |
10.Written Problem. Write a point-slope equation that has
the given point and slope:
m = 3/2 and (4, 4) . Answer: y - 4 = (3/2)(x -4) |
| 11. In the previous problem, graph
the line. Draw a line between two points. Answer: start at (4,4),
then run 2, then rise 3 to get to new point ( 6, 7). Draw a line through
these two points. |