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Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.