Understanding Linear Equations from Graphs

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

• y = mx + b

• y = ax^2 + bx + c

• y = a/x + b

• y = ax + b

In the slope-intercept form, what does 'b' represent?

• The origin

• The x-intercept

• The y-intercept

• The slope of the line

How do you calculate the slope from a graph?

• By adding the x and y coordinates

• By dividing the rise by the run

• By subtracting the y-intercept from the x-intercept

• By finding the x-intercept

What is the slope of a line that rises 3 units and runs 4 units?

• 3/4

• 4/3

• 1/3

• 7

If a line has a negative slope, in which direction does it slope?

• Vertically

• Upwards

• Downwards

• Horizontally

What is the equation of a line with a slope of -3 and a y-intercept of -4?

• y = 3x - 4

• y = -4x - 3

• y = 3x + 4

• y = -3x - 4

How do you simplify a slope of 2/1?

• 1/2

• 0

• 2

• 1

What is the y-intercept of a line that crosses the y-axis at +3?

• +3

• -3

• +1

• 0

If a line has a slope of 1, how is it represented in the equation?

• y = 0x + b

• y = x - b

• y = x + b

• y = 1x + b

What should you do first when writing the equation of a line from a graph?

• Find the x-intercept

• Write down the y-intercept and slope

• Calculate the midpoint

• Determine the line's length