The graph shows the distribution of the cost of drinks at a popular coffee shop. The distribution is approximately Normal, with a mean of $3.34 and a standard deviation of $0.75. What percentage of coffee drinks cost within $1.50 of the mean?

34%
68%
95%
99.7%

f

step-by-step explanation:

f

the linear relationship that represents a variation in direct proportion is the linear function that varies according to the numbers of its domain, for example the cost of producing x number of items can be represented in direct proportion by f (x) = mx + b, where m is the constant of proportionality, x the number of articles produced and b the fixed cost

set the two equations for y equal to each other. solve for x. this will be the x-coordinate for the point of intersection. use this x-coordinate and plug it into either of the original equations for the lines and solve for y.