# Chapter 6 - Algebra: Equations and Inequalities - 6.1 Algebraic Expressions and Formulas - Exercise Set 6.1 - Page 349: 72

See below.

#### Work Step by Step

a) According to the line graph the proportion of students who anticipated a starting salary of $40000$ is $14\%$. b) Plugging in $s=40$ into the formula we get: $p=-0.01(40)^2+0.8(40)+3.7=-16+32+3.7=19.7$ This estimate is quite far off what we got in part a).

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