Question

Algebra!

Answer 1

A picture is enlarged by keeping its width the same and increasing its length. The scatter plot below shows the perimeter of the picture (y) for different lengths (x):

Answer 2

Which function best represents the data in the scatter plot?

y = 2x − 20
y = 2x + 20
y = x − 20
y = x + 20

Answer 3

I know is B or D. Leaning more towards B.

Answer 4

take (20,60) and (50,120)

Answer 5

Okay, hold up.

Answer 6

120 - 60
---------
50 - 20

Answer 7

So your gradient is 2.

Answer 8

60
--- = 2
30

Answer 9

Yes.

Answer 10

y=2x+c

Answer 11

And, since it is a positive slope it must be, B y = 2x + 20

Answer 12

now set y=60 and x=20 to find c

Answer 13

no not neccessary, the +20 or -20 is the y intercept.

Answer 14

negative slope is when you have a negative mx

Answer 15

Ok, so, what do I do for Step 2?

Answer 16

@saseal ?

Answer 17

so after you set the value you should get 60=2(20)+c. solve for c.

Answer 18

So your answer should be 20. Therefore, answer is y=2x+20.

Answer 19

Radical!!!