Greater Toronto home prices jumped in September as buyers appeared to put an end to a slump that began in the spring with government measures to cool a scorching real-estate market. The Toronto Real Estate Board (TREB) said the average GTA home sold for $775,546 in September, up 5.9 per cent from August’s average of $732,292. Prices were up 2.6 per cent compared with September last year, but remain 15.8-per-cent lower than they were at the market’s peak in April before the downturn began. The market recovery last month was driven primarily by buoyant sales of detached houses in the…