4.1, 4.2, 4.3, 6.7 Quiz

Find the slope for each set of ordered pairs. (5, 2) (3, -1) (19, 4) (-13, -6)

Find the value of r so that the line through (2, 8) and (r, -4) has slope -3.

If y varies directly as x and y=9 when x=14, find x when y=21. Direct variation: y = kx 9 = k (14) k = 21 = x Multiply each side by the reciprocal x =

Write the equation of the line with the given slope and y-intercept. Slope , y-intercept: -7 (0, 12), m=-8 y = -8x + 12

Write the slope intercept form of the equation for the line graphed. Use ordered pairs to find slope (3, 0) and (0, -2) b= -2

Write a linear equation in slope-intercept form for the situation. A video store charges $2.75 per rental and a $15 fee to become a member of the rental club. A plumber charges a house call fee of $60 plus $45 and hour for as long as he is working. y = 2.75x + 15 y = 45x + 60

Graph the equation y = 5x

Graph the equation. 3x + 4y = 16 -3x -3x 4y = -3x +16 /4 /4 /4 /4 /4 /4 y = -3/4x + 4

Graph the inequality. y > - x + 3 Test (0, 0) 0 > -3/4 (0) + 3 0 > 0 + 3 0 > 3 false