1. In 1920 the record for a certain race was 46.8 sec. In 1970, it was 45.8 sec. Let R(t)= the record in the race and t= the number of years since 1920.

a. Find a linear function that fits the data
b. Use the function in (a) to predict the record in 2003 and in 2006
c. Find the year when the record will be 44.8 sec

2. Given the function h described by h(x)=x+14, find each of the following

h(0)=

h(-18)=

h(-12)=

h(15)=

h(x+14)=

3. Find the slope intercept equation of the line that has the given characteristics.

Slope 9.8 and y intercept (0, -2)

The slope intercept equation is y=

4. Find an equation of the line having the given slope and containing the given point. Express your answer in the form x=a, y=b or y=mx+b

M= -7, (6,0)

The equation of the line is y=

5.Find the slope and y intercept of the line. Write fractional anwers in lowest terms.

6y+5x+9=19+5x

The slope is

The y intercept is 0,

Find the slope an y intercept of the line. Write the fraction answer in lowest terms.

Y= -2/7x -8/5 The slope is________ The y intercept is 0, ?

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