Linear Functions in Standard Form

Finding X and Y Intercepts

100

When finding the x-intercept, what value do we plug in for y?

Zero

200

What form do we express the x and y intercepts in?

(x,0) and (0,y)

300

Find the x and y intercepts of: 3x - 4y = 12

(4,0) and (0,-3)

400

Find the x and y intercepts: -8x - 9y = 72

(-9,0) and (0,-8)

500

Find the x and y intercepts: 3x + 1.5y = 30

(10,0) and (0,20)

Solving functions in Standard Form

100

Given the equation 3x+11y=100, if x=4 what is y?

y=8

200

Given the equation 1.5x+4y=5050, if x=2100 what is y?

y=475

300

Given the equation 4x+6y=2340, if y=266 what is x?

x=186

400

Given the equation 2x+3y=15.55, if x=3.95 what is y?

y=2.55

500

Given the equation 3x+7y=31, if y=10 what is x?

x=-13

Graphing in Standard Form

100

What two points are we able to quickly find using the Standard Form?

x and y intercepts

200

The x-intercept lies on the ___ axis and the y-intercept lies on the ____ axis.

x-axis, y-axis

300

After we plot the x and y intercepts on the graph, what do we do?

Draw a straight line through the dots, put arrows on the end of the line

400

What is the minimum number of points needed to make a line?

2 points

500

What kind of slope will the line graphed by the points (4,0) and (0,-8) have? (positive, negative, zero, undefined)

positive