The variables x and y vary directly. Write an equation that relates x and y, when x = 4 and y = 2.

Question

lgbasallote · Answer

hint: direct variation means y = kx

does that help?

anonymous · Answer

No I'm so lost if I don't finish this test with a good score I don't graduate :(

lgbasallote · Answer

substitute x = 4 and y = 2 into y = kx

tell me what you get

anonymous · Answer

I got it thanks so much

anonymous · Answer

Could you help me with some questions??

lgbasallote · Answer

sure

anonymous · Answer

What is the distance between the points (-1, 5) and (3, 7)? Round your answer to the nearest hundredth.

lgbasallote · Answer

use the distance formula $$\large \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$$
are you familiar with that?

anonymous · Answer

Ummmm

lgbasallote · Answer

x2 means second x coordinate
x1 means first x coordinate
y2 means second y coordinate
y1 means first y coordinate

ring a bell?

anonymous · Answer

oh ok yea I must seem pretty stupid

lgbasallote · Answer

nahh not really

anonymous · Answer

I can't figure it out

anonymous · Answer

What is the distance between the points (-1, 5) and (3, 7)? Round your answer to the nearest hundredth.
A. 3.46
B. 4.47
C. 10.77
D. 12.65

lgbasallote · Answer

here's another hint |dw:1345181658527:dw|