Someone please answer the last three questions ive asked on my account, they all got answered by bots and im being timed on a quiz, so please help

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?

Mallory has been offers two different jobs. she can baby sit for 6 hours a week and get $8.50 an hour. or she can work at the library for 14 hours a week and make $5.50 an hour. which job will allow her to save the most money after 6weeks?