•  What is the slope-intercept form of the equation of the line with a slope of ¼ and y-intercept at the origin?

•  Which equation is graphed at the right?

• Which is an equation of the line that passes through

(4, -5) and (6, -9)?

y  =  -­‐‑2x  +  3• What is the standard form of

the equation of the line through (6, -3) with a slope

of ⅔?

2x  -­‐‑  3y  =  21• What is the equation of the

line through (-2, -3) with an undefined slope?

x  =  -­‐‑2• Find the slope-intercept

form of the equation of the line that passes through

(-1, 5) and is parallel to -4x + 2y = 8.

y  =  2x  +  7•  If line q has a slope of -2,

what is the slope of any line perpendicular to q?

½•  A scatter plot of data comparing

the time in minutes Beverly spends studying for her math test and the score she received on the test contains the ordered pairs (45, 89) and (60, 94). Which is the slope-intercept form of an equation for the line of fit?

⅓x  +  74  =  yA baby blue whale weighed 3 tons at birth. Ten days later, it weighed 4 tons. Assuming the same rate of growth, which equation shows the weight w when the whale is d days old?

w  =  0.1d  +  3•  Estimate how many hits a

batter would get with 72 times at bat using the best-fit line.

22Write a linear equation in slope-intercept form to model the situation: A telephone company charges $28.75 per month plus $0.10 a minute for long-distance calls.

y  =  0.10x  +  28.75Write the slope-intercept form of an equation for the line graphed at the right.

y  =    ⅔x  -­‐‑  2Write the slope-intercept form of the equation of the line parallel to the graph of 2x + y = 5 that passes through (0, 1).

y  =  -­‐‑2x  +  1 Write the slope-intercept form of the equation of the line perpendicular to the graph of that passes through (3, -2).

y = − 32x − 7

y  =    ⅔x  -­‐‑  4 What is the y-intercept of the function y = |x + 2| - 1?

Answer  Key

•  y = -2x + 3 •  2x - 3y = 21 •  x = -2 •  y = 2x + 3 •  ½ •  ⅓x + 74 = y •  w = 0.1d + 3 •  22 •  y = 0.10x + 28.75 •  y = ⅔x – 2 •  y = -2x + 1 •  y = ⅔x - 4 •  y = 1