-Slope Writing
10%
A line passes through (9, -9) and (10,-5).
a. Write an equation for the line in point-slope form.
b. Rewrite the equation in standard form using integers.
Perpendicular
O
y + 9 = 4(x - 9); - 4x + y = -45
llel and
ular Lines
y - 9 = 4(x - 9); -4x + y = 45
Absolute Value
y - 9 = 4(x + 9); -4x + y = 45
phing Absolute
ations
y + 9 = 4(x + 9); -4x + y = -45
st

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables