SAT Math: Linear Functions

Lesson: Linear Functions

After you watch the lesson above, try this practice problem
When Tom places a cup of water in a refrigerator for 10 minutes, the temperature of the water is 45 degrees F. As the cup of water sits in the refrigerator longer, the temperature decreases linearly. After sitting in the refrigerator for 15 minutes, the temperature of the water is 38 degrees F. If the temperature decreases at a constant rate as the time in which the water sits in the refrigerator increases, which of the following linear models best describes the temperature, t, in degrees F after m minutes sitting in the refrigerator?

$t=-1.4m+59$

$t=-14m+59$

$t=-1.4m$

$t=1.4m+59$

Lesson: Parallel and Perpendicular Lines

After you watch the lesson above, try this practice problem
Which of the following equations below is the equation of a line that is perpendicular to $y = \dfrac{2}{3}x - 5$ ?

$2y + 3x = 4$

$3y + 2x = 5$

$2y - 3x = -5$

$-2y + 3x = 3$

Lesson: Quadrants

After you watch the lesson above, try this practice problem
Line n doesn't pass through quadrant III. Which of the following could be the equation of line n?

$y=\dfrac{3}{5}x+3$

$y=-\dfrac{1}{5}x+2$

$y=4$

$y=-\dfrac{1}{2}x+20$