X: -2, -1, 2, 5
Y: 80, 70, 40, 10
What is the slope of this line?____
What is the y-intercept of the line?___
What is the equation of the line?____
To find the slope of the line, we use the formula: slope = (change in Y) / (change in X)
So, slope = (10-80) / (5-(-2))
slope = -70 / 7
slope = -10
To find the y-intercept, we use the formula: y = mx + b, where m is the slope and b is the y-intercept.
Using the point (-2, 80) we can substitute the values to find the y-intercept.
80 = -10(-2) + b
80 = 20 + b
b = 60
Therefore, the y-intercept is 60.
The equation of the line is: y = -10x + 60.