book Maths Puzzle Numerical Ability

Identify the shape of the graph, transform it into standard form, and sketch the graph.
9x^2 + 25y^2 - 18x - 150y + 9 = 0

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book Other Question

Write the equation of each line. Give the answer in slope-intercept form.

The line through (-1, -@0 with slope 3/7
425/604=425*100/604=70.36% and 230/344=230*100/344=66.86%
when compared 70.36%>66.86%

is there a way to increase the validity of my findings?