Answer:
4
Step-by-step explanation:
The pattern is that each number is multiplied by 4 so the answer is 4. Oh this was 3 years ago.... raspberries!!
17y = 85x
A) Yes
B) No
C) 5
D) 1/5
2) Determine whether the relationship is a direct variation.
X : 3, -1 , -4
Y : -6, 2, 8
A) yes
B) No
3) Is the relationship shown a direct variation? (it's not absolute value is a table chart)
| X | Y |
| -2 | 5 |
| 1 | 3 |
| 4 | 1 |
A) yes
B) No
4) Determine whether the relationship is a direct variation.
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| X | 6 | 9 | 17 |
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| Y | 13.2 | 19.8 | 37.4 |
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A) yes
B) no
5) Determine which equation does NOT represent a direct variation.
A) 6x - y = 0
B) y = 4x + 1
C) y = -2x
D) y = 1/3x
6) (multiple answer pick 2) Tell whether the equation represents a direct variation. If so identify the constant of variation. y + 3x = 0
A) Yes
B) No
C) -3
D) 1/3
E) 3
1.) The answer is (B) No, because direct variation is written as y = kx, but the problem was not written that way.
2.) Answer: Yes; if you write x = ky, you will find that each x value given multiplied by a common k equals a corresponding y value.
3.) Answer: No; each x value does not multiply by a constant k to get the y values.
4.) Answer: Yes; each x value multiplies by 2.2 to get each corresponding y value.
5.) Answer: B; this is the only one that isn't or can't be written in y = kx form.
6.) Answer: Yes & -3; y + 3x = 0 can be written as y = -3x, which is a direct variation equation. The constant is just the -3.
1) b
2) no
3) c
4) a
b. (-3,6)
c. (3,2)
d. (3,5)
2. Which equation is the equation of a line that passes through (-10,3) and is perpendicular to y=5x-7?
a. y = 5x + 53
b. y = -1/5x - 7
c. y = -1/5x + 1
d. y = 1/5x + 5
the person covers different distances at different speeds
to find the average speed we have to find the total distance travelled and the total time taken
average speed = total distance travelled / total time taken
first 200 miles
speed - 50 mph
time taken for 50 miles - 1 hour
then time for 200 miles - 1/50 x 200 = 4 hours
last 100 miles
speed - 40 mph
time taken for 40 miles - 1 hour
time for 100 miles - 1/40 x 100 = 2.5 hours
total time taken for a distance of 300 miles - 2.5 + 4 = 6.5 hours
average speed = 300 miles / 6.5 hours = 46.2 mph
average speed is 46.2 mph