The average temperature of a city in july was 31 degrees celsius above 0. the average temperature of the same city in january was 18 degrees celsius above 0. how many degrees higher was the average temperature of the city in july than in january?

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.