Please show work so I can get a better understanding. Question 19 According to Symantec Corpora!

Please show work so I can get a better understanding.

Question 19 

According to Symantec Corpora!on, "2016 Internet Security Threat Report", "spear-phishing" cyberattacks against American small businesses are steadily increasing. 18% of all "spear-phishing" cyberattacks against American businesses in 2011 targeted "small" businesses (those with less than 250 employees). In 2015, 43% of all "spear-phishing" cyberattacks against American businesses targeted "small" businesses. 

a. (Multiple Choice) Which of the following linear equations could be used to predict annual percentage of all "spear-phishing" cyberattacks against US businesses that target "small" businesses ("y") in a given year "x" since 2011, where x = 0 represents the year 2011? Explain/show work separately. 

1. y=0.16x+18
2. B. y = 0.16x + 2011 
3. C. y=6.25x+18 
4. D. y = 6.25x + 2011 

b. Use the equation from part (a) to predict the percentage of all "spear-phishing" cyberattacks against US businesses that will target "small" businesses in the year 2019. Round answer to nearest tenth of a percent. Show work separately. 

Enter answer rounded to nearest tenth (1 place a"er decimal). Do NOT include "%" sign 

c. (Multiple choice - enter letter of correct statement) Choose which statement best interprets the slope of the linear regression equation you found in part (a): 

A. 6.25% annual increase in percentage of all "spear-phishing" cyberattacks against US businesses that target "small" businesses 

B. 6.25% annual decrease in percentage of all "spear-phishing" cybera%acks against US businesses that target "small" businesses 

C. 0.16% annual increase in percentage of all "spear-phishing" cybera%acks against US businesses that target "small" businesses 

D. 0.16% annual decrease in percentage of all "spear-phishing" cybera%acks against US businesses that target "small" businesses