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GED Math: Graphs and Functions
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GED Math: Graphs and Functions
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25 Questions

1. Target heart rate is calculated according to the function T(a)=.7(220-a) where T is the target heart rate in beats per minute and the variable a represents age in years. If a person's target heart rate is 126 beats per minute, what is the person's age in years?

2. What is the equation of the line that goes through the points (-6,-7) and (-3,8)?

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9. f(x)=x²-5x+4
What's f(-6)?

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14. What's the equation of a line that passes through the points (-8, 6) and (2, -4)? Write your answer in slope-intercept form.

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16. Sarah is saving up money for a trip by working part-time. The amount of money she has saved up can be represented by the function S(h) = 20h + 800, where S is the total money she has saved and h is the number of hours she works. If she wants to save $2,000, how many hours does she need to work?

17. Is the point (-4,-9) on the line with the equation 8x-9y=-7?

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21. What's the equation of a line that has a slope of 1/2 and that goes through the point (-4,2)?

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24. What's the slope of a line that goes through the points (-4, 8) and (3, -5)?

25. What's the slope of a line perpendicular to the line with the equation below?
y=7x - 8

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