4-3 Writing Equations In Point-Slope Form Worksheet With Answers - Cognero Page 2
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1
242.
ANSWER:
4-3 Writing Equations in Point-Slope Form
y − 7 = − (x + 3)
Write each equation in slope-intercept form.
44.
ANSWER:
46. Write an equation in point-slope form, slope-intercept form, and standard form for a line that passes through (−2, 8)
with slope
.
ANSWER:
y − 8 =
(x + 2);
y =
x +
;
8x − 5y = −56
Barometric p
48. WEATHER
ressure is a linear function of altitude. The barometric pressure is 598 millimeters of
mercury (mmHg) at an altitude of 1.8 kilometers. The pressure is 577 millimeters of mercury at 2.1 kilometers.
a. Write a formula for the barometric pressure as a function of the altitude.
b. What is the altitude if the pressure is 657 millimeters of mercury?
ANSWER:
a. f (x) = −70x + 724
b. about 0.96 km
52. REASONING Write an equation for the line that passes through (−4, 8) and (3, −7) . What is the slope? Where
does the line intersect the x-axis? the y-axis?
ANSWER:
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