Histogram of bivariate normal distribution

y normal variable -7.00 -3.50 0.00 3.50 7.00 -7.00 -3.50 0.00 3.50 7.00 -7.00 -3.50 0.00 3.50 7.00 x normal variable -7.00 -3.50 0.00 3.50 7.00