## mikaa_toxica13 2 years ago *help requested* *fan and medal awarded* Which relation does not represent a function? (-7, 3), (-3, 1), (1, -4), (5, -6) (-4, 2), (1, 5), (-4, 0), (5, 6) (2, 0), (4, 8), (6, 5), (10, 5) (-3, 6), (-1, 1), (0, 4), (3, 7) What is the slope and y-intercept of the graph of 2x + 3y = 18? slope = -2; y-intercept = (0, 18) slope = 2 ; y-intercept = (0, 6) - -- 3 slope = 3 ; y-intercept = (0, 2) - -- 2 slope = 6; y-intercept = (0, 2) - -- 3

1. yrelhan4

slope is -(coefficient of x)/(coefficient of y) and to find the y intercept put x=0 and solve..

2. yrelhan4

B becasue each number represents a domain and range number in a physical plain (-4,2) has a Domain of -4 and a range of 2 by laws of math, a real function CAN NOT HAVE THE SAME DOMAIN meaning that if any of the first numbers are the same in the set, it CAN NOT BE A FUNCTION so in B you have (-4, 2), (1, 5), (-4, 0), (5, 6) since (-4,2) and (-4,0) both share a -4 as their domain this set can not be a function

3. mikaa_toxica13

math is gibrish to me. can u explain it in a simpler way ?

4. novagirl114

For a simpler way to determine if points form a function you plot the points on a coordinate plane (graph the points). Then any time you can draw a lines up and down and if any line goes through more than one point you do not have a function.

5. mikaa_toxica13

oh okay. but i think the first one is c and the second is b. am i right ?

6. mikaa_toxica13

@novagirl114 @yrelhan4

7. yrelhan4

both B..

8. mikaa_toxica13

9. yrelhan4

well i just explained.. slope is -(coefficient of x)/(coefficient of y) = -2/3 and for y intercept put x=0 and you'll get y=6

10. yrelhan4

and if any of the first numbers are the same in the set, it CAN NOT BE A FUNCTION.

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