To find where the line ( y = 3x + 7 ) crosses the y-axis, set ( x = 0 ). Plugging this into the equation gives ( y = 3(0) + 7 = 7 ). Therefore, the line crosses the y-axis at the point ( (0, 7) ).
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7
If you mean: y = 3x+5 and y = 2x-7 then x = -12 and y = -31
The slope of a line perpendicular to one with slope m is -1/m. So for a line with slope 1/7, any line perpendicular to it will have: slope = -1 / (1/7) = -7
-7
The line in a fraction means "divided by." 7/9 = 7 divided by 9.