What is the slop of the graph of y=-3x?
2 answers:
Answer:
Slope : -3
Step-by-step explanation:
Rearrange:
Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
y-(-3*x)=0 <--------- rearranged linear equation
STEP 1:
Equation of a Straight Line
Solve y+3x = 0
"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.
In this formula :
y tells us how far up the line goes
x tells us how far along
m is the Slope or Gradient i.e. how steep the line is
b is the Y-intercept i.e. where the line crosses the Y axis
The X and Y intercepts and the Slope are called the line properties. We shall now graph the line y+3x = 0 and calculate its properties
Graph of a Straight Line :
picture (attachment)
Calculate the Y-Intercept :
Notice that when x = 0 the value of y is 0/1 so this line "cuts" the y axis at y= 0.00000
y-intercept = 0/1 = 0.00000
Calculate the X-Intercept :
When y = 0 the value of x is 0/3 Our line therefore "cuts" the x axis at x= 0.00000
x-intercept = 0/3 = 0.00000
Calculate the Slope :
Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -0.000 and for x=2.000, the value of y is -6.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of -6.000 - -0.000 = -6.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)
Slope = -6.000/2.000 = -3.000
Geometric figure: Straight Line
Slope = -6.000/2.000 = -3.000
x-intercept = 0/3 = 0.00000
y-intercept = 0/1 = 0.00000
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