Intercepts
Explain what a y-intercept is.
Any of these:
- Point where a line crosses the y-axis
- Point where x = 0
- Beginning (or initial value)
The slope of a line that goes through (-1, 7) and (3, 9)
What is 1/2?
The equation 4x - 2y = 10 written in slope intercept form
What is y = 2x - 5?
y = -7x + 6 written in standard form.
What is 7x + y = 6?
Is (-4, 7) a point on the line y=-2x-1? How do you know?
yes
y = 2x + 5 written in standard form.
Either of these is acceptable:
-2x + y = 5 or 2x - y = -5
The x- and y-intercepts of 3x + 9y = 27
What is x = 9 and y = 3?
The equation of a line (in slope-intercept form) that has m=6 and b=(0,4)
What is y = 6x + 4?
Chips cost $2 per bag and cookies cost $3 per pack. Write an equation to show how many bags of chips (x) and packs of cookies (y) I can buy with $20.
What is 2x + 3y = 20?
The x- and y-intercepts of the graph of 2x - 6y = -12
What is x = -6 and y = 2?
The slope of a line of the equation 4x + 3y = 8
What is -4/3?
The equation 5x + 8y = 100 represents the number of vans (x) and buses (y) needed to transport students to a field trip. If 6 vans are used, how many buses will be needed to transport the remaining students?
What is 9?
The x- and y-intercepts of
y = (-4/5) x - 8
What is x = -10 and y = -8?
The equation of a line with an undefined slope and goes through the point (-9, 14).
What is x = -9?
2x - 8y = 32 crosses the x-axis at what point?
What is (-4, 0)?