Farmer Ali had a well on his property 200 feet deep. When the well went dry, he hired
a company to drill the well deeper He used
the equation d = -75t - 200 to find the depth
of the well, d, using the number of days the
company drilled, t.
• What is the slope of the line?
• What does the slope represent in the
context of the problem?

Anew test for ra is being developed. the test is administered to 750 patients with ra and 750 without ra. for the sake of the question, assume the prevalence of ra in this population is 50%. of the 750 patients with ra, 575 have a positive result. of the 750 patients without ra, 150 have a positive result. what is the positive predictive value of the new test? a575/(575+150) b. 600/(600+ 150) c. 575/(575+125) d. 600/(600+ 125)