find the equation of the line using the exact numbers
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Answer:
y = -0.25x - 6
Step-by-step explanation:
You can either just read off the slope m = -0.25 and the intersection with the vertical n = -6 or you form a system of equations from points you choose on the graph. For example:
(0,-6);(4,-7)
The general equation for a line:
y = m*x + n
The two points on the graph form a system of two equations:
1. -6 = m*0 + n
2. -7 = m*4 + n
You can read off n right away fro equation 1:
n = -6
Plugging n into equation 2:
-7 = m*4 - 6 => -1 = m*4 => m = -1/4
It wants you to write the answer in slope intercept form
y = mx + b
m is the slope ([tex]\frac{rise}{run}[/tex])
b is the y-intercept (where the line intersects the y axis)
The rise is 1
The run is -4 (this is negative because it runs from right to left)
^^^Both of these can be seen labeled in pink on the graph below
Slope: [tex]\frac{-1}{4}[/tex] = -0.25
^^^This has a negative slope because the line is decreasing from left to right
Y - intercept: (0, - 6) <<< b will just be -6
^^^Can be seen labeled in green on the graph below
We know that m (slope) is [tex]\frac{-1}{4}[/tex] (aka -0.25)and that b is -6. You can plug this into the equation y = mx + b:
y = [tex]\frac{-1}{4}[/tex]x - 6
OR
y = -0.25x - 6
Hope this helped!
~Just a girl in love with Shawn Mendes