Functions
Is the relation (-1,6) (4,2) (7,2) a function?
Yes
The slope of the line that passes through the points (3,-4) and (7,2).
What is 3/2?
3x^2 - 6x = 0
What is x = 0, 2
What is the standard form of an equation?
Ax+By=C
f(-2) when f(x) = 6x - 4.
What is -16?
The slope of the line parallel to the line y = -3x - 7.
What is -3?
x^2 - 25 = 0
What is x = 5, -5
Find the zeros of the function
f(x) = 2x/(x^2 - 4)
What is x=0 (0,0)
(f-g)(x) when f(x) = 3x and g(x) = x + 5
What is 2x - 5?
The equation of the line that passes through the points (0,2) and (3,-2).
What is y = -4/3x + 2?
x^2 + 2x - 24 = 0
What is x = -6, 4?
1 5/7 hours
Find the domain of
f(x) = 2x/(x^2 - 4)
What is all real numbers except 2 and -2
Solve the system of equations:
x+2y = 8
2x+3y = 10
x=-4, y=6
3x^2+2x-1
What is x = 1/3, -1
Solve for x:
x/(x+4)=4/(x+2)
x=2
(-2 is extraneous)
(f o g)(x) when f(x) = 3x and g(x) = x + 5
What is 3x + 15
With a tail wind, a helicopter traveled 400 miles in 1 hour and 30 minutes. The return trip against the wind took 30 minutes longer. Find the speed of the plane in still air.
262.5 mph
4x^2 - 15x + 9 = 0
What is x = 3, 3/4?
Find the linear regression line:
x: -5, -4, -2, 7, 8
7: -5, -3, -1, 6, 9
y = .96x+.43