Linear Functions

Identifying Linear Functions

100

What is a function whose graph forms a straight line called?

linear function

200

What is the standard form of a linear equation?

Ax+By=C

300

Tell whether the set of ordered pairs satisfies a linear function. Explain (2,4), (5,3) (8,2), (11,1)

Yes, constant change in 3 for x. Constant change of -1 in y

400

Tell whether the function is linear?

Yes it is linear.

Using Intercepts

100

What is the x-coordinate of the point where the graph intersects the x axis called?

What is the x intercept

200

Find the x intercept: 2x- 4y=8

x=4

300

Find the x and y intercepts of 3x- 2y=12

x=4 and y=-6

400

Find the x and y intercepts of 2x + 4y=8. Then graph it

x=4 and y=-2

Slope

100

What is the slope of a horizontal line?

Zero

200

What is the slope of a vertical line?

Undefined

300

Find the slope of (20,3000) and (60,2000)

What is -25

400

Find the slope of the equation: 6x + 5y=30

What is -6/5

Slope intercept form

100

What is slope intercept form?

y=mx+b

200

Write the equation in slope intercept form: slope=0, y intercept =-5

y=-5

300

Graph the equation: y= 4x-3

See graph

400

Write the equation in slope intercept form and graph: 3x+2y=8

y=-3/2+4 See graph

Evaluating Functions

100

Evaluate is another word for....

Solve

200

An input is the ___ -value of a function?  

Hint: (x or y value)

x-value

300

f(x)= 2x-10, Find f(6) ? 

2

400

f(x)=3x+2, Find the input when f(x)=17 ?

5