Question

Function and graph question, please see the drawing for graph:

Answer 1

Please see attachment for question, with the graph...

Answer 2

1 and 3
correct ??

Answer 3

Please explain...

Answer 4

3 bcz as a=0 the line is a straight line
it is of form y=mx+c

Answer 5

Ok, and why I, and why not II?

Answer 6

graph 1 is a curve .substituting the values of a,b,c we get a curve
it can be written as f(x)=y=(x^2-6x+9)-(4)
i.e y=(x-3)^2-(2)^2

Answer 7

it is of form y=p^2-q^2

Answer 8

ok, and why is II incorrect?

Answer 9

because c = 5 as in the graph c is passing from -ve y-axis

Answer 10

umm so?

Answer 11

how does it invalidate the graph?

Answer 12

i think it's D

Answer 13

2 shud be smthin like that...excuse my poor drawing

Answer 14

1) c=5 for all cases => Setting x=0 you should have y = 5. This eliminates the second graph II.
2) Graph III is linear because a=0. For y = 0 you should have x = 5/6. Your uploaded graph is a bit blurred i can't see if this holds.
3) For graph I you should have y = 0 for x = 1 and x = 5, so I is correct.
Looks like I and III are ok.

Answer 15

Thanks dan. :)

Answer 16

And Karthik, Nick and Avinash. :)