Question

1. Write an equation of the line that passes through (8, 3) and (4, 3).
A. y = 3
B. y = 4x + 3
C. y = 4
D. y = 3x

2. http://roads.advancedacademics.com/contentserver/content/roadssection/277812/questions/4-hw7/direct_variation_7.gif

Which of the direct variation equations has this graph?
A. y = 2/3 x
B. y = 3x
C. y = 1/2 x
D. y = 2x

Answer 1

The equation for the slope of a line between two points\[(x_1,y_1),(x_2,y_2)\]is\[m=\frac{y_2-y_1}{x_2-x_1}\]where m is the slope of the line and the points are given.
Find first the slope of the line using what is above, then you can continue with the problem.

Answer 2

So would 1. be C?

Answer 3

close
it is the other horizontal line

Answer 4

A ?

Answer 5

right good job :)

Answer 6

for the next one you need to look at the picture
can you tell me what points those red dots are?

Answer 7

(0,0) and (3,2) ?

Answer 8

great!
now use them as
(x1,y1) and (x2,y2) in the formula above

Answer 9

So would 2 be B?

Answer 10

why do you think it should be B ?
what did you get for m?

Answer 11

Oh never mind I got A. After i actually wrote down the equation and figured it out.

Answer 12

Great job!
That's why I put the formula there :)

Answer 13

YES!!!! do u think u can cum and help me with the others?

Answer 14

I'll look

Answer 15

k