functions versus relations / finding point-slope line eqns

[dreday]

For 1-4, determine whether each relation is a function. Provide your reasons for identifying a relation as a function.

1. {(3, 4), (5, 9), (9, 9), (2, 3)}
2. {(0, 0), (0, 1), (1, 4), (2, 4)}
3. {(2, 1), (4, 5), (8, 4), (1, 0)}
4. {(8, 3), (8, 0), (7, 7), (4, 7)}

For 5-8, use the given conditions to write the point-slope and slope-intercept forms of each line.

5. slope: 4, passing through (1, 3)
6. slope: 8, passing through (4, -1)
7. slope: -5 passing through (-4,-2)
8. slope: -2 passing through (0, -3)
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Edited by stapel -- Reason for edit: Removing ALL CAPS; correcting formatting, numbering, terminology

 

[jonboy]

For the function problems, a function is for every x value there is ONLY ONE y value. You can have multiple y - values for different x values.

Points slope form is: y - y₁ = m (x - x₁)

Slope intercept form is: y = mx + b

m = slope ; b = y - intercept.

 

[dreday]

For the function problems, a function is for every x value there is ONLY ONE y value. You can have multiple y - values for different x values.

Points slope form is: y - y₁ = m (x - x₁)

Slope intercept form is: y = mx + b

m = slope ; b = y - intercept.

JONBOY IS THIS THE ANSWER FOR THE FIRST PROBLEM OR THE SECOND PROBLEM

 

[tkhunny]

The answer is "yes". jonboy has covered ALL the material in that initial response. Let's see what you can do with it.

 

[dreday]

The answer is "yes". jonboy has covered ALL the material in that initial response. Let's see what you can do with it.

THANK YOU VERY MUCH