A. y = k/x B. y = kx C. y = x² D. y = √x 相关知识点: 试题来源: 解析 B。解析:当y与x成正比(y varies directly as x)时,其数学关系表示为y = kx(k为常数)。选项A是y与x成反比的关系。选项C是二次函数关系。选项D是平方根关系,都不符合成正比的关系。反馈...
If y varies directly as x, find the constant of variation k and the direct variation equation for the situation.y=0.7 when x=1.5Find the constant of variation k.k=\ 0.5 (Round to one decimal place.)Write the direct variation equation. ...
英语翻译一 Given that y varies directly as x^2 and that y=48 when x=4 ,find the equation connecting y and x . 答案 直接:已经给出:y随x的2次方的变化成正比例变化,且当x=4时,y=48,找出使y与x联系在一起的等式.已知:y与x的2次方成正比,而且当x=4时,y=48;求函数y=f(x).相关推荐 1...
百度试题 结果1 题目【题目】If y varies directly with r, write an equationfor the direct variation. Then find each value.Find when y= 14, if y= 7 when=8. 相关知识点: 试题来源: 解析 【解析】y=7/8x ;x=16 反馈 收藏
Find the constant of variation y varies directly with x, and y = 3 when x = 27. For the equation -4y=8x , what is the constant of variation? a. -4 b. -2 c. 1 d. 2 Let f : R \to R ...
y varies inversely as the square of x and directly as the cube z and the variables are connect by the equation y=kz³/x.Where k is constant.Given thatx 1 2 by 10 20 40z a 8 32(a)Find the value of k(b)Hence find the values of a(c)Hence find the values of b先翻译后给...
In a table, how do you tell if y varies directly with x and write an equation if it does?Direct proportionalityDirect proportionality of variation is the relationship between the function and the independent variable where the value of the function increase and decrease...
It is said that one variable varies directly as the other. The formula for direct variation is ( y=kx), where ( k) is the constant of variation. ( y=kx) Solve the equation for ( k), the constant of variation. ( k=y/x) Replace the variables( x) and ( y) with the actual...
given: x - 4 = -y or, -y = x - 4 or, y = -(x - 4) or y = -x + 4 or y = 4 - x i.e. for x > 4, the equation x - 4 = -y is true. If y varies directly as x and y 18 when x 24 find x when y 15?
y\ varies directly as (x+3)a n d\ y=8\ w h e n\ x=1. What is the value of y\ w h e n\ x=2? 6 b. 10 c. 12 d. 16