#1
Which of the following is the equation of a line in slope-intercept form?
y = mx + b
ExplanationStandard form for representing a line where 'm' is the slope and 'b' is the y-intercept.
#2
What is the slope of a line parallel to the y-axis?
Undefined
ExplanationThe slope is undefined for lines parallel to the y-axis as they are vertical.
#3
What is the distance between two points (x1, y1) and (x2, y2) in the coordinate plane?
sqrt((x2 - x1)^2 + (y2 - y1)^2)
ExplanationFormula for calculating the distance between two points using the Pythagorean theorem.
#4
What is the equation of a plane in three-dimensional space?
Ax + By + Cz = D
ExplanationStandard form of the equation of a plane, where A, B, and C are coefficients and D is a constant.
#5
What is the equation of a line perpendicular to y = 3x + 2 and passing through the point (2, -1)?
y = -1/3x - 2
ExplanationPerpendicular lines have negative reciprocal slopes, thus the slope is -1/3.
#6
In parametric form, what are the coordinates of a point on a line given by x = 2t - 1 and y = 3t + 4?
(-1, 4)
ExplanationParametric equations represent coordinates in terms of a parameter 't'.
#7
What is the standard form of the equation of a circle with center (h, k) and radius r?
(x - h)^2 + (y - k)^2 = r
ExplanationEquation representing a circle with center (h, k) and radius 'r' in the coordinate plane.
#8
In the matrix equation AX = B, what does matrix A represent?
Coefficients
ExplanationMatrix A represents the coefficients of the variables in the system of linear equations.
#9
What is the determinant of a 2x2 matrix [[a, b], [c, d]]?
ad - bc
ExplanationFormula for calculating the determinant of a 2x2 matrix.
#10
Which conic section is described by the equation Ax^2 + By^2 = C?
Circle
ExplanationConic section represented by a quadratic equation where A and B are equal.
#11
What is the intersection point of the lines x - y = 3 and 2x + y = 1?
(-1, -4)
ExplanationThe point where the two lines intersect, found by solving the system of equations.
#12
What is the equation of the line of reflection for the line y = 2x + 5?
y = 2x - 5
ExplanationReflecting a line across the x-axis changes the sign of the constant term.
#13
What is the eigenvalue of a matrix?
A real number associated with the matrix
ExplanationEigenvalue is a scalar value that represents how a linear transformation behaves.
#14
What is the condition for three points to be collinear in the coordinate plane?
The slope between any two points is the same
ExplanationCollinear points lie on the same line, meaning they share the same slope.
#15
If two lines are parallel, what can be said about their slopes?
They have the same slope
ExplanationParallel lines have identical slopes but different intercepts.
#16
What is the equation of the sphere with center (h, k, l) and radius r?
(x - h)^2 + (y - k)^2 + (z - l)^2 = r^2
ExplanationEquation representing a sphere with center (h, k, l) and radius 'r' in three-dimensional space.
#17
What is the cross product of vectors A = <1, 2, 3> and B = <4, 5, 6>?
<-3, 6, -3>
ExplanationCross product of two vectors yields a vector orthogonal to both, direction determined by the right-hand rule.