Question

Which equation best describes the graph? Please dont just put anything down for points

y
A
6
2
M
-8 -6 -4 -2
6
8
-2
-4
-6
-8
A y = 2x + 3
© y=-3x + 3
B y = - 2x + 2 / 2
D y = - 2x + 3

Answer 1

D

Explanation:

The line intercept y axis in (0,3), so in the generic equation y= mx + b, b must be 3. The line is also decreasing, so m must be negative

We have two options: B and D

If we try to put y=0 in these equations we have:

-1/2x + 3 = 0

Let’s solve the equation

-x + 6 = 0

x -6 = 0

x = 6

Checking the graph we notice that the line doesn’t intercept x axis in (6,0), so option B is wrong

For be sure, let’s try the same with option D

-2x + 3 = 0

-2x = -3

x = 3/2

This time is correct, so D is the right answer