Question 1157258

what is the equation of a line that has a gradient of -2 and passes through the line (1, 7)
<pre>Point-slope form of a linear equation: {{{matrix(1,3, y - y[1], "=", m(x - x[1]))}}}
y - 7 = - 2(x - 1) ----- Substituting - 2 for m, and (1, 7 ) for (x, y)
y - 7 = - 2x + 2
{{{highlight_green(matrix(1,5, y, "=", 2x + 2 + 7, "=====>", highlight(matrix(1,3, y, "=", - 2x + 9))))}}}