Y-intercept 3 and slop -6

Ascatterplot is produced to compare the size of a school building to the number of students at that school who play an instrument. there are 12 data points, each representing a different school. the points are widely dispersed on the scatterplot without a pattern of grouping. which statement could be true

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)