Prepared: Thu Apr 1 11:21:49 CST 1999

MATH 1151

Quiz I

1) Solve the following equations:
a)

when x=7 or x=-1.

b)

A quotient is zero only when the numerator is zero and the denominator is not 0, so the zeros are, the zeros of except for x=0.

Multiply both sides by .

when x=0 or x=1/9. But we have to eliminate x=0 , so the only solution is x=1/9.

2) Sketch the graph of and label the vertex and the intercepts.

3) Express the equation of the line passing through (-2,-8) and (2,6) in the form y=mx+b.

The slope is

and so, the equation in the point-slope form is (pick the second point (2,6))

which becomes when simplified.