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Analytic Geometry and Linear Equations Quiz

#1

Which of the following is the equation of a line in slope-intercept form?

y = mx + b
Explanation

Standard 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
Explanation

The 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)
Explanation

Formula 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
Explanation

Standard 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
Explanation

Perpendicular 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)
Explanation

Parametric 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
Explanation

Equation 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
Explanation

Matrix 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
Explanation

Formula for calculating the determinant of a 2x2 matrix.

#10

Which conic section is described by the equation Ax^2 + By^2 = C?

Circle
Explanation

Conic 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)
Explanation

The 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
Explanation

Reflecting 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
Explanation

Eigenvalue 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
Explanation

Collinear 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
Explanation

Parallel 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
Explanation

Equation 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>
Explanation

Cross product of two vectors yields a vector orthogonal to both, direction determined by the right-hand rule.

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