Writing the equation of a line given two points

The video tutorial explains how to find the slope and Y-intercept of a line given two points. It emphasizes the importance of consistent labeling of points in the slope formula and demonstrates the calculation of the slope. The tutorial then shows how to use the slope and one of the points to find the Y-intercept, ultimately leading to the formulation of the line's equation.

What is the formula used to calculate the slope between two points?

• X1 - X2 over Y1 - Y2

• Y1 - Y2 over X1 - X2

• X2 - X1 over Y2 - Y1

• Y2 - Y1 over X2 - X1

Why is it important to be consistent when labeling points for slope calculation?

• To ensure the slope is positive

• To avoid errors in calculation

• To make the equation simpler

• To match the textbook example

What is the result of 9 - 6 over -8 - (-12)?

• 3/4

• 4

• 2

• 1

How do you find the Y-intercept once the slope is known?

• By using the midpoint formula

• By guessing based on the graph

• By substituting a point into the equation

• By using the slope formula again

What is the final equation of the line given the slope is 3/4 and Y-intercept is 15?

• y = 4/3x - 15

• y = 4/3x + 15

• y = 3/4x - 15

• y = 3/4x + 15