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Can you help me with a question? What is the equation of the blue line?

Can you help me with a question? What is the equation of the blue line?-example-1
User Andreee
by
2.9k points

2 Answers

12 votes
12 votes

Answer:

y = - x - 1

Explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

calculate m using the slope formula

m =
(y_(2)-y_(1) )/(x_(2)-x_(1) )

with (x₁, y₁ ) = (- 1, 0) and (x₂, y₂ ) = (0, - 1) ← 2 points on the line

m =
(-1-0)/(0-(-1)) =
(-1)/(0+1) =
(-1)/(1) = - 1

the line crosses the y- axis at (0, - 1 ) ⇒ c = - 1

y = - x - 1 ← equation of blue line

User Desy
by
3.1k points
15 votes
15 votes

Answer:

y = -x - 1

Explanation:

y = mx + b

slope (m): Since the line is going downhill, the slope will be negative

slope = rise / run

slope = 1 / 1

slope = 1

m = -1

y - intercept (b): this when x = 0, the line is crossing the vertical line (y-axis)

b = -1

so y = mx + b is

b = -1, m = -1

y = (-1)x + (-1)

User Jatobat
by
2.7k points
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