Systems
The quadrant in which the solution to the following system lies:
y = x + 4
y = 2x + 5
What is II
Solve: m + 5 > -3
What is m > -8
Is (0, 0) a solution to y > x - 2?
Yes
Line of best fit always has to be drawn with a straight edge (T/F)
Use y = 250(1.2)^t What is the growth factor?
1.2
The solution to the system of equations:
r + s = -6
r - s = -10
What is r =-8 and s= 2?
Solve: -3(2n + 1) > 9
What is n < -2
Is the graph y>3x+1 solid or dashed, where would you shade
dashed, above
Line of best fit should connect all the dots (T/F)
False
Is the following growth or decay: f(x) = 2^x
growth
The solution to the system:
x = 4y
2x + 3y = 22
What is (8, 2)?
Is 10 a solution to the inequality below: 3(t + 1) - 4t >= -5
No
Describe how you would shade y < 3x + 4
What is "below"
Why do we draw a line of best fit?
To make predictions
Is the following growth or decay: f(x) = 7 (0.94)^x
decay
The solution to the system:
2x + 3y = 6
3x + 5y = 15
What is (-15, 12)?
What are the solutions of 10 - 8a >= 2(5 - 4a) ?
All real numbers
Is (3, -4) a solution to y < -13 + 3x
No
When most of the points are close to the line of best fit, but one is very far, this is called an _______________.
outlier
Is compound interest linear or exponential
exponential
The sum of two numbers is 104. Their difference is 68. What are the numbers?
What are 86 and 18?
In a community garden, you want to fence in a vegetable garden that is adjacent to your friend's garden. You have at most 42 ft of fence. What are the possible lengths of your garden, given that the width of your garden is 12 ft?
length <= 9 ft
How many points are the answer to a system of linear inequalities that intersect?
What is an infinite number of points.
If sales at a ski store increase as the temperature drops-is this a positive or negative correlation?
Negative
The population of Baconburg starts off at 20,000, and grows by 13% each year. Write an exponential growth model and find the population after 10 years.
What is f(10) = 20,000(1.13)^10 and population of 67,891