Linear Functions Notes

What does the 'm' represent in the slope-intercept equation y = mx + b?

• The grid line

• The x-coordinate

• The y-intercept

• The slope

If the slope is 3 and the y-intercept is -5, what is the equation of the line?

• y = 3x + 5

• y = -3x - 5

• y = 3x - 5

• y = -3x + 5

What is the equation of a line with a slope of -1/2 and a y-intercept of -3?

• y = -1/2x + 3

• y = -1/2x - 3

• y = 1/2x - 3

• y = 1/2x + 3

How do you determine the slope from a graph?

• Count how far the line moves up and to the right

• Count how far the line moves down and to the left

• Count how far the line moves up and to the left

• Count how far the line moves down and to the right

If a line intersects the y-axis at -2 and has a slope of -1/3, what is its equation?

• y = -1/3x + 2

• y = -1/3x - 2

• y = 1/3x - 2

• y = 1/3x + 2