Answer:
y = - 
x + 11
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Here m = - , then
y = - x + c ← is the partial equation
To find c substitute (8, - 9) into the partial equation
- 9 = - 20 + c ⇒ c = - 9 + 20 = 11
y = - x + 11 ← equation of line
Answer:
77-33
Step-by-step explanation:
1)
11(7-3)
2)
(11 x 7) - (11 x 3)
3)
77 - 33
Answer:
77-33
The last option:The change in y-values is constant for evenly spaced x-values.
Remember that the change in y divided by the change in x is the slope of a line and it is constant.
Answer:Percent ≈ 66.6667
Step-by-step explanation:
To calculate the percent of any number, you multiply the value (n) by the percent (p) and then divide the product by 100 to get the answer, like this:
(n × p) / 100 = Answer
In our case, we know that the initial value (n) is 120 and that the answer (amount of decrease) is 80 to get the final value of 40. Therefore, we fill in what we know in the equation above to get the following equation:
(120 × p) / 100 = 80
Next, we solve the equation above for percent (p) by first multiplying each side by 100 and then dividing both sides by 120 to get percent (p):
(120 × p) / 100 = 80
((120 × p) / 100) × 100 = 80 × 100
120p = 8000
120p / 120 = 8000 / 120
p = 66.6666666666667
Percent ≈ 66.6667
That's all there is to it! The percentage decrease from 120 to 40 is 66.6667%. In other words, if you take 66.6667% of 120 and subtract it from 120, then the difference will be 40.
