Question

Puzzle 3

Can you find the slope-intercept equation of each line and type the correct
code? Please remember to type in ALL CAPS with no spaces.
Puzzle #3
4
3
4
answer choices
A: B:
C:
y=- 2x + 1 y=-3x+1 y = 3x - 3
D:
E:
F:
Y.X
Y = x + 1 = 5x + 3
G: H: I:
y = 3x + 1 y = 2x + 3 YEX
3
1
-4 -3
-2.
-1
1
2
3
4
-1
1
Type the 4-
letter code into
the answer
box. All CAPS,
no spaces.
-2
2
-4
200070
Your

Answer 1

DIBF

Explanation:

It is helpful to look at the value of the y-intercept and the sign of the slope. The y-intercept is the y-value where the line crosses the y-axis. The slope is the "rise" divided by the "run". You can count horizontal and vertical grid squares between the y-intercept and the next grid crossing to determine the slope.

The slope-intercept equation is ...

y = mx + b . . . . . . . line with slope m and y-intercept b

__

1.

y-intercept is -3, slope is negative (-1/3). Matches choice D.

2.

y-intercept is 0. Matches choice I.

3.

y-intercept is 1, slope is negative and is steep (-3). Matches choice B.

4.

y-intercept is 3, slope is negative (-1/2). Matches choice F.

The code is DIBF.