How many are functions? 1.(5,2)(9,0)(2,5)(5,7)
2.(-2,5)(-4,7)(-9,10)(-11,12)
3.(3,-5)(7,9)(2,3)(-5,9)
4.(4,7)(-2,5)(-2,6)(-5,10)
10 POINTS PLS HELP!

Which answer is it for it to be simplified completely?

Points d and e are midpoints of the sides of triangle abc. the perimeter of the triangle is 48 units. what is the value of t? ο ο ο ο 7t +

30 points and i will give brainliest the club will base its decision about whether to increase the budget for the indoor rock climbing facility on the analysis of its usage. the decision to increase the budget will depend on whether members are using the indoor facility at least two times a week. use the best measure of center for both data sets to determine whether the club should increase the budget. assume there are four weeks in a month. if you think the data is inconclusive, explain why.