Question

Match the correct equation with the graph:
x = 4
y = -3x + 4
y = 5/2x + 5
y = -2/5x + 2
y = -3/2x + 2

Answer 1

Hmm so let's start somewhere simple.
See how the line is DECREASING as we move to the right?
Soooo we know that this function will have a negative slope, its decreasing toward the right.

y=mx+b

Our equation is linear, in this form. Our slope is the m term.
So we can immediately one of the options.

Also, x=4 represents a line at the points x=4 that goes straight up and down.
Our line doesn't go straight up and down, so we can eliminate that one also.

b= our y-intercept (the place where the line crosses the y-axis)

what point is the line crossing the y-axis at? :D

Answer 2

We can immediately ignore* one of the options
sorry typo in there..

Answer 3

is it one of these 2? y = -2/5x + 2
y = -3/2x + 2

Answer 4

Hmm it might be, those both have negative slope like we want.

The two options you chose, are telling us that they cross the y-axis at y=2.
Where does the graph look like it's crossing the y-axis in your picture.
it looks more like its crossing at y=4 doesn't it? :D

Answer 5

yea it is that makes more sense lol ;D y = -3x + 4 this answer makes more sense ;D

Answer 6

yay team \c:/

Answer 7

YAY! THANK U!