Understanding the Equation of a Line

What is the formula used to calculate the slope of a line given two points?

• x2 - x1 / y2 - y1

• y2 - y1 / x2 - x1

• x1 - x2 / y1 - y2

• y1 - y2 / x1 - x2

Which formula is used to express the equation of a line in point-slope form?

• y = mx + b

• y - y1 = m(x - x1)

• x = my + b

• y = m(x - x1) + y1

What is the slope of the line passing through the points (2, 7) and (-1, 3)?

• 7/3

• 4/3

• 3/4

• 3/7

Which point is used to form the equation of the line in the given problem?

• (0, 0)

• (-1, 3)

• (3, 4)

• (2, 7)

What is the final simplified form of the line equation?

• y = 4/3x - 13/3

• y = 3/4x + 13/3

• y = 4/3x + 13/3

• y = 3/4x - 13/3