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Pre-Algebra Lesson 11 Quiz: Proportional Relationships
25 points
Kassie and Luke timed each other during swim practice. The speed at which Kassie swims is represented
by the equation d = 1.22t, where d is the number of meters that she swims and t is the amount of seconds
it takes. The speed at which Luke swims is represented in the table shown. Who swims at a faster rate? *
9
Luke's Speed
3
6
3.72 744
Time in seconds (t)
Distance in meters (d)
12
11.16
14.88
Mark only one oval.

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

the answer is 13

step-by-step explanation:

5*5=25

12*12=144

25+144=169

169^2=13