Writing Linear Equations from Descriptions and Graphs

What is the slope-intercept form of a linear equation?

• y = mx + b

• y = m + bx

• y - y1 = m(x - x1)

• ax + by = c

In the equation y = mx + b, what does 'b' represent?

• The x-intercept

• The rate of change

• The slope

• The y-intercept

Given a slope of 5 and a point (0, 12), what is the equation of the line in slope-intercept form?

• y = 5x - 12

• y - 12 = 5(x - 0)

• y = 5x + 12

• y = 12x + 5

If a line passes through the points (-3, 5) and (2, 0), what is the slope of the line?

• -5

• 1

• -1

• 5

What is the point-slope form of the equation for a line with slope -1 passing through (2, 0)?

• y = -1(x + 2)

• y - 2 = -1(x - 0)

• y + 2 = -1(x - 0)

• y - 0 = -1(x - 2)

Given the points (6, -2) and (0, 7), what is the slope of the line?

• 2/3

• 3/2

• -3/2

• -2/3

If a cornstalk grows 0.79 cm per day, what is the slope of the line representing its growth?

• 7.9

• 0.07

• 1.79

• 0.79

What is the equation of a line representing a cell phone cost of $99.99 and a monthly service fee of $29.99?

• y = 29.99x + 99.99

• y = 99.99x + 29.99

• y = 29.99 + 99.99x

• y = 99.99 + 29.99x

John runs 5 miles in 35 minutes and 7 miles in 49 minutes. What is the slope of the line representing his run?

• 1/7

• 5

• 7

• 1/5

Which form is best to use when you have a slope and a point on the line?

• Standard form

• Point-slope form

• Quadratic form

• Slope-intercept form