Answers Basic Intermediate Algebra Sem. 1Unit Test

Unit Test — Unit test Answers

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Which graph represents a proportional relationship?

On a coordinate plane, a straight line with positive slope goes through points (0, 0), (1, 2), and (2, 4).

On a coordinate plane, a vertical line is at x = negative 3.

On a coordinate plane, a horizontal line is at y = 3.

On a coordinate plane, a curved line goes through the origin.

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Which table of ordered pairs represents a proportional relationship?

A 2-column table with 3 rows. Column 1 is labeled x with entries negative 2, negative 4, negative 6. Column 2 is labeled y with entries 4, 16, 36.

A 2-column table with 3 rows. Column 1 is labeled x with entries negative 4, negative 6, negative 8. Column 2 is labeled y with entries negative 8, negative 12, negative 18.

A 2-column table with 3 rows. Column 1 is labeled x with entries negative 3, negative 5, negative 7. Column 2 is labeled y with entries 5, 3, 1.

A 2-column table with 3 rows. Column 1 is labeled x with entries negative 3, negative 6, negative 9. Column 2 is labeled y with entries 12, 24, 36.

The unchanging value of the ratio between two proportional quantities is

the constant of proportionality.

the constant rate.

the x-value of an ordered pair.

the y-value of an ordered pair.

Based on the table, what is the unit rate for one gallon of gasoline?GasolineNumber of gallonsPrice2$6.603$9.904$13.20

$3.30

$4.60

$5.60

$6.50

Simon is trying to figure out how much it will cost to buy 30 cases of water for a school picnic. How much will Simon pay for 30 cases of water? Water Prices by the CaseNumber of casesPrice in dollars1566.002088.0035154.00

$99.00

$119.00

$121.00

$132.00

The constant of proportionality for the amount of electricity in kilowatt hours and the cost per kilowatt hour is $0.11. Which graph models this situation?

A line graph titled Electricity Cost has Kilowatt hours on the x-axis and Cost in dollars on the y-axis. 100 Kilowatt hours is 11 dollars; 250, 27 dollars and 50 cents.

A line graph titled Electricity Cost has Kilowatt hours on the x-axis and Cost in dollars on the y-axis. 100 Kilowatt hours is 9 dollars; 250, 22 dollars and 50 cents.

A line graph titled Electricity Cost has Kilowatt hours on the x-axis and Cost in dollars on the y-axis. 100 Kilowatt hours is 12 dollars; 250, 30 dollars.

A line graph titled Electricity Cost has Kilowatt hours on the x-axis and Cost in dollars on the y-axis. 100 Kilowatt hours is 13 dollars; 250, 32 dollars and 50 cents.

Mika wrote the table of points below. xy023568Which explains whether or not Mika has described a proportional relationship, and why?

Mika has described a proportional relationship because the ordered pairs are linear and the line passes through the origin.

Mika has not described a proportional relationship. Although it is a linear relationship, it does not pass through the origin.

Mika has not described a proportional relationship. Although it passes through the origin, it is not a linear relationship.

Mika has described a proportional relationship because the line does not pass through the origin.

Which ordered pair would form a proportional relationship with the point graphed below?

(10, –20)

(–30, 20)

(–10, 5)

(35, –20)

Which graph shows four points that represent equivalent ratios?

Option

There are 18 children at a sleepover party. Eleven of the children have blankets, and the other 7 children have stuffed animals. No children have both. If Jorge arrives and carries a stuffed animal, what fraction of the children at the party now have stuffed animals?

StartFraction 7 Over 19 EndFraction