Question

Select the equations of the lines that are parallel to the line whose equation is y = 3x + 5.

6x + 2y = 12
-3x + y = 8
3y = 9x
y = -x

[PICK MORE THAN ONE]

Answer 1

Which equations can you rule out?

Answer 2

A?

Answer 3

also the last one?

Answer 4

Great! Why do you think so?

Answer 5

it just doesn't look like it could be an equation to me

Answer 6

Okay, that's fine. Let me show you why it isn't A or D. Give me one moment...

Answer 7

So the line is in the form y = mx +c which indicates it's a straight line. The y intercept is 5 and the gradient is 3. Now if you wanted a line to be parallel to another line, what would have to be the same?

Answer 8

Here I will give you hints to chose from.

Gradient? all the y values? Y intercept?

Answer 9

slope of the line?

Answer 10

Not quite it's gradient. Do you see one of the possible answers having the same slope of line?

Answer 11

no. sorry

Answer 12

Exactly! Which answer choices have the same gradient

Answer 13

B and C

Answer 14

Great job!

Answer 15

Thanks!!! :)

Answer 16

No problem!