16 Questions
What happens to the line when x = -3?
The line will go vertically across the x-axis because there is no y-intercept.
What is the formula to calculate the midpoint of a line segment?
M = (x₁ + x₂)/2 , (y₁ + y₂)/2
How do you find the x-coordinate using the midpoint formula?
x = (x₁ + x₂)/2
What is the formula to calculate the length of a line segment?
√((y¹ - y²)² + (x¹ - x²)²)
What is the method to find the intersection of two lines?
Equating the two equations, y = y.
How do you find the x-coordinate of the intersection point?
Solve the equation obtained by equating the two lines.
What is the condition for two lines to be perpendicular?
The product of their gradients equals -1.
How do you check if two lines are perpendicular?
Multiply the gradients of the two lines. If the product equals -1, they are perpendicular.
What is the formula to determine the equation of a line when given two points and the gradient?
y-y_1=m(x-x_1)
What is Euler's formula used for in polyhedral?
E=F+V-2
How do you find the gradient of a line given two sets of coordinates?
m=(y^2-y^1)/(x^2-x^1)
What is the rise/run formula used to determine?
The gradient (m) of a line
What is the x and y intercept method used to find?
The x and y intercepts of a line
How do you find the y-intercept of a line given the equation 2y=3x+6?
Let y=0 and solve for x, then let x=0 and solve for y
What does the equation y=4 represent in terms of the graph of a line?
A horizontal line with a y-intercept of 4
What is the purpose of rearranging an equation to the form y=mx+c?
To find the gradient (m) and y-intercept (c) of a line
Study Notes
Equations of Lines
- The point-slope form equation is
y - y_1 = m(x - x_1)
, wherem
is the gradient and(x_1, y_1)
is a point on the line. - The gradient can be calculated using
m = (y_2 - y_1) / (x_2 - x_1)
. - The gradient-intercept form equation is
y = mx + c
, wherem
is the gradient andc
is the y-intercept.
Euler's Formula
- Euler's formula is
E = F + V - 2
, whereE
is the number of edges,F
is the number of faces, andV
is the number of vertices in a polyhedral.
Midpoint Formula
- The midpoint formula is
M = ((x_1 + x_2) / 2, (y_1 + y_2) / 2)
, where(x_1, y_1)
and(x_2, y_2)
are two points on a line segment.
Distance Formula
- The distance formula is
√((y_2 - y_1)^2 + (x_2 - x_1)^2)
, where(x_1, y_1)
and(x_2, y_2)
are two points.
Intersection of Lines
- To find the intersection of two lines, set the two equations equal to each other, i.e.,
y = y
. - Solve for
x
and then substitute the value ofx
into one of the original equations to findy
. - The product of the gradients of two perpendicular lines is
-1
.
This quiz covers formulas and equations in mathematics, including the point-slope form and Euler's formula for polyhedral shapes.
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