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4.01 Key features of quadratic functions

Interactive practice questions

Find the value of the quadratic expression $3x^2$3x2 for each of the following $x$x-values.

a

$x=5$x=5

b

$x=-5$x=5

Easy
1min

Find the value of the quadratic expression $3x^2+1$3x2+1 when $x=1$x=1.

Easy
< 1min

Find the value of the following quadratic expression when $x=7$x=7.

$4x+5x^2$4x+5x2
Easy
< 1min

Find the value of the following quadratic expression when $x=8$x=8.

$6x^2+5x-4$6x2+5x4
Easy
< 1min
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Outcomes

II.F.IF.4

For a function that models a relationship between two quantities, interpret key features of graphs and tables in terms of the quantities, and sketch graphs showing key features given a verbal description of the relationship. Key features include: intercepts; intervals where the function is increasing, decreasing, positive, or negative; relative maximums and minimums; symmetries; end behavior; and periodicity.

II.F.IF.5

Relate the domain of a function to its graph and, where applicable, to the quantitative relationship it describes.

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