Graphing Intercepts and Finding Slope from Points

What is the standard form of a linear equation?

• x^2 + y^2 = r^2

• y = ax^2 + bx + c

• y = mx + b

• ax + by = c

How do you find the x-intercept of the equation 2x - 3y = 12?

• Set x to 0 and solve for y

• Set both x and y to 0

• Set y to 0 and solve for x

• Set y to 1 and solve for x

What is the y-intercept of the equation 2x - 3y = 12?

• (0, -4)

• (-4, 0)

• (0, 4)

• (6, 0)

What is the formula for slope?

• ax + by = c

• (y2 - y1) / (x2 - x1)

• (x2 - x1) / (y2 - y1)

• y = mx + b

If you have points (8, -2) and (6, -10), what is the slope?

• -2

• -4

• 4

• 2

What is the slope of a line that rises 3 units and runs 5 units?

• 3

• 5

• 5/3

• 3/5

How do you find the slope from a graph?

• Measure the angle of the line

• Find the midpoint of the line

• Calculate the area under the line

• Count the rise and run between two points

What is the slope of a horizontal line?

• -1

• 1

• Undefined

• 0

What is the slope of a vertical line?

• 1

• Undefined

• -1

• 0

If a line has a slope of -3, what does this indicate about the line?

• It goes up 1 unit for every 3 units it goes right

• It goes up 3 units for every 1 unit it goes right

• It goes down 3 units for every 1 unit it goes right

• It goes down 1 unit for every 3 units it goes right