What multiple by something equal to 42

What is the slope of the line (-7,2) (4,6)

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)