Question
For the linear function f , the table above gives some values of x and their corresponding values f (x), where c is a constant. Which of the following equations defines f ?
- f (x) = x + c
- f (x) = x + 3c
- f (x) = cx + c
- f (x) = 3cx + 3c
The correct answer is: f (x) = cx + c
HINT :- Let the linear function be f(x) = ax + b substitute values and find a and b
Let the linear function be f(x) = ax + b
Step 1 : find b in terms of c
Let f(x) = ax + b at x =0 , f(x) = c
c = a(0) + b ⇒ ∴b = c
Step 2: find a in terms of c by substituting x = 1 and f(x) = 2c
lnf(x) = ax + b at x = 1 ,f(x) = 2c
2c = a(1) + b⇒ ∴a + b = 2c
Substitute b=c in the condition
a + b = a + c = 2c ⇒ a = c
As a = c and b = c then f(x) = cx + c.
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Refer to the following information.
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Of all juniors and seniors who attended a particular high school during the 2014 -2015 school year, 149 participated in the clubs listed in the table above. Each of the 149 students participated in only one of the four school clubs listed. The table shows the distribution of the 149 students by class and club participation. Of the number of juniors and seniors in the drama club, the 25% who walked to school represents of the total number of juniors and seniors who walked to school. How many juniors and seniors walked to school?
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Of all juniors and seniors who attended a particular high school during the 2014 -2015 school year, 149 participated in the clubs listed in the table above. Each of the 149 students participated in only one of the four school clubs listed. The table shows the distribution of the 149 students by class and club participation.
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Of all juniors and seniors who attended a particular high school during the 2014 -2015 school year, 149 participated in the clubs listed in the table above. Each of the 149 students participated in only one of the four school clubs listed. The table shows the distribution of the 149 students by class and club participation.
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A survey was given to residents of all 50 states asking if they had earned a bachelor’s degree or higher. The results from 7 of the states are given in the table above. The median percent of residents who earned a bachelor’s degree or higher for all 50 states was 26.95%. What is the difference between the median percent of residents who earned a bachelor’s degree or higher for these 7 states and the median for all 50 states?
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A gram of Carbohydrates contain '4' calories, a gram of protein contains '4' calories, and a gram of fat contains '9' calories. Because one gram of fat contains '9' calories, divide the total number of calories by 9. 400, calories divided by 9 equals 44 grams. Then multiply 700 calories by 9 to obtain 78 grams.
To calculate total fat, look for the amount of fat found per serving of food in grams to determine its fat content. For example, if '1' teaspoon of butter weighs 4.7 grams and contains 3.8 grams of fat, you'll know that fat makes up about 80% of its weight.
The scatterplot above shows the numbers of grams of both total protein and total fat for eight sandwiches on a restaurant menu. The line of best fit for the data is also shown. According to the line of best fit, which of the following is closest to the predicted increase in total fat, in grams, for every increase of 1 gram in total protein?
A gram of Carbohydrates contain '4' calories, a gram of protein contains '4' calories, and a gram of fat contains '9' calories. Because one gram of fat contains '9' calories, divide the total number of calories by 9. 400, calories divided by 9 equals 44 grams. Then multiply 700 calories by 9 to obtain 78 grams.
To calculate total fat, look for the amount of fat found per serving of food in grams to determine its fat content. For example, if '1' teaspoon of butter weighs 4.7 grams and contains 3.8 grams of fat, you'll know that fat makes up about 80% of its weight.