A line on a graph passes through the points (-1,-2) and (1,4). Find the slope using the point slope formula. If y-intercept is +1, write the answer in the slope intercept form?
Answer:
Slope = 3
y-intercept = 1
Slope intercept form:
Y = 3x + 1
Explanation:
To calculate the slope using the point slope formula we have:
m = [4-(-2) / 1-(1)]
m= 4 + 2 / 1 + 1
m= 6 / 2 = 3
The y-intercept is +1. It is at this point the line crosses the y-axis.
Putting it all in the slope intercept form we have:
y= mx + b
y = 3x+1
©Copyright 2007.Najwa S. Hirn. All rights reserved.
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