Given linear equation y = -3x a. find the y-intercept and slope. b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation. c. use two points to graph the equation.

cistG

cistG

Answered question

2020-12-06

Given linear equation y = -3x
a. find the y-intercept and slope.
b. determine whether the line slopes upward, slopes downward, or is horizontal, without graphing the equation.
c. use two points to graph the equation.

Answer & Explanation

Nathanael Webber

Nathanael Webber

Skilled2020-12-07Added 117 answers

(a) In given example,
y-intercept =b0=0
Slope =b1=3
(b) When slope is positive then line slope will show upward in a graph. When slope is negative then line slope will show downward in a graph.
Here, slope is -3 which is negative. Hence, line slopes will be downwards in a graph.
(c) Linear regression equation is, y = -3x
Suppose x = 0 then y =0
If x = 1 then y = -3
Therefore, two points are (0,0) and (1,-3)
Following is the graph for above two points:

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