a linear model shows that a relationship between items bought and cost of bill has a correlation coefficient of 0.98. what kind of correlation is this?
What is strong positive correlation
100
The formula that is used to find the axis of symmetry of a quadratic function in the form ax^2 + bx + c
Factored form of the following
(difference of perfect squares)
9x^4 - y^2
What is (3x^2 - y)(3x^2 + y)
200
the graph of a quadratic function intersects the x-axis at -3 and 5. What is a possible equation for the function?
What is y = x^2 - 2x - 15
200
factor the quadratic expression
x^2 - 5x - 50
What is (x + 5)(x - 10)
200
I buy peaches and apples at the store. The equations below model the number of pounds of peaches(p) and pounds of apples(a) that I buy. What's the total number of pounds of fruit bought?
p + a = 3
2p + 1.5a = 3.46
What is 3 pounds total
200
Out of all 50 states, 26% of them use nuclear power as energy. Whats the number of states that use nuclear power as energy? (what is 26% of 50?)
What is 13 states
300
expression that is the simplified form of (2x^2 + 3)(x + 4)
What is 2x^3 + 8x^2 + 3x + 12
300
the population of insects doubles every year. On Jan. 1, the population is 150. find the equation that will represent the population (y) after (x) years. Fill in the blank to complete the equation y = ____ (___^x)
What is y = 150(2^x)
300
the zeros of the quadratic equation 0 = x^2 + 2x - 3
What is x = 1 and x = -3
300
the solution to the system of equations:
y = 3x - 2
y = x
What is (1,1)
300
a man puts 5 fish in a pond and the number of fish doubles each month over a period of time. Write the function f(x) to model the number of fish in the pond after x months
f(x) = _______
What is f(x) = 5(2^x)
400
solution to x^3 = 512
What is x=8
400
The population of cats in the shelter (y) is decreasing at an annual rate of 3.5% a year. If the population of cats is 5000 right now, fill in the blank to complete equation that models the population (y) after (x) years. y = 5000(____)^x
What is 0.965
400
the vertex of the quadratic function y = x^2 + 2x - 3
What is (-1,-4)
400
2x^2 - 5x - 3 = 0
the 2 values that make this equation true
What is x = -0.5 and x = 3
400
the expression that is equivalent to (8x^3)^(2/3)
What is 4x^2
500
write the expression using a radical
x^(2/3)
What is "cube root of x^2"
500
The population of a fish (y) in a pond is 23500. The population of fish in the pond is decreasing at an annual rate of 1.55%. What's the function that models this situation after (x) years?
What is y = 23500(0.9845)^x
500
Which direction is the parabola opening if its equation is
y = -t^2 + 14t - 40
What is down
500
solution to the system of equations
x + y = 2.5
1.58x + 1.09y = 3.46
What is x = 1.5, y = 1
500
a function is shown f(x) = 5(x - 2)^2 + 3
what is the minimum value of the function