Log in nesla-anguh 5 years agoPosted 5 years ago. Direct link to nesla-anguh's post “Can anybody help me find ...” Can anybody help me find the output, k, when the input, t, is −7. I need a hand. Thank you • (19 votes) Kim Seidel 5 years agoPosted 5 years ago. Direct link to Kim Seidel's post “You just neet to replace ...” You just neet to replace "t" with the given value "-7" (30 votes) ShevrillHD 7 years agoPosted 7 years ago. Direct link to ShevrillHD's post “1. Can a function have na...” 1. Can a function have name like add(x) instead of f(x)? • (10 votes) ZeroFK 7 years agoPosted 7 years ago. Direct link to ZeroFK's post “1. Yes. In mathematics i...” 1. Yes. In mathematics it is more common to use a single letter (sometimes a Greek letter), but a function name can be anything. After all it's just a way to communicate to other humans what you're talking about, changing a name doesn't change the math. Sophia 6 years agoPosted 6 years ago. Direct link to Sophia's post “Can Someone Help Me Solve...” Can Someone Help Me Solve This Function? • (7 votes) Kim Seidel 6 years agoPosted 6 years ago. Direct link to Kim Seidel's post “Find f(0): f(0) = 3(0) +...” Find f(0): f(0) = 3(0) + 4 (7 votes) liv 4 years agoPosted 4 years ago. Direct link to liv's post “does anyone know how to d...” does anyone know how to do this? • (10 votes) angel a year agoPosted a year ago. Direct link to angel's post “how to do what” how to do what (1 vote) Ralph Reznik 5 years agoPosted 5 years ago. Direct link to Ralph Reznik's post “What are the general rule...” What are the general rules for solving functions? • (4 votes) nuha ✨ 5 years agoPosted 5 years ago. Direct link to nuha ✨'s post “like terms should ALWAYS ...” like terms should ALWAYS be combined, that's one thing you can keep in mind (13 votes) 4300414835 4 years agoPosted 4 years ago. Direct link to 4300414835's post “How do you know where the...” How do you know where the output is? • (9 votes) yuri.grillo-teixido 7 months agoPosted 7 months ago. Direct link to yuri.grillo-teixido's post “To get the output (or kno...” To get the output (or know where it is) you have to solve the equation for y (y is the output). So to graph it you'll use the input as the x coordinate and the output as the y coordinate. (0 votes) natalie.sch 8 years agoPosted 8 years ago. Direct link to natalie.sch's post “So the "f" in f(x) stands...” So the "f" in f(x) stands for function? As in solve the function with whatever the x variable may be? • (3 votes) Jason Berg 8 years agoPosted 8 years ago. Direct link to Jason Berg's post “That's not quite right, i...” That's not quite right, it's more accurate to say that "f" is the name of the function. You can name a function whatever you want, but f is just the most common one people use. (4 votes) Hana a month agoPosted a month ago. Direct link to Hana's post “why not just put the numb...” why not just put the number there instead of using functions? • (4 votes) brycemc1 4 years agoPosted 4 years ago. Direct link to brycemc1's post “Wouldn't the answer be 25...” Wouldn't the answer be 25 cause a neg. times a neg is 25? • (3 votes) Panik_Monstrr a year agoPosted a year ago. Direct link to Panik_Monstrr's post “Yes, since a negative num...” Yes, since a negative number squared is also positive. (1 vote) zhou john a year agoPosted a year ago. Direct link to zhou john's post “why this kind of function...” why this kind of function is quite different from the function that I learned in my school. We usually write like y=kx+b (2 votes) Kim Seidel a year agoPosted a year ago. Direct link to Kim Seidel's post “There are many types of e...” There are many types of equations. The video has a quadratic equation written in function notation. You have been doing linear equations written in slope-intercept form. So, you should be familiar with replacing "x" with a given value to calculate its corresponding y-value to find a point. The lessons in this section are trying to teach you about how to understand and use function notation. The process is the same, the notation is different. In later lessons you will learn about additional types of equations and how to understand how to graph them in the coordinate plane. Hope this helps. (4 votes)Want to join the conversation?
k = 10t-19
k = ?
k = 10(-7)-19
Then, follow order of operations rules to calculate the value of "k".
Give it a try. Comment back if you get stuck or have questions.
2. Can a function have more than 1 argument, like f(a, b, c)?
3. Can a function's argument have a name like "apes", "apples" instead of "x", "y"?
2. Yes. A simple example is f(x,y) = x * y.
3. Yes. See answer 1: single letter names are conventional, but not required. They're all just names. You could even draw pictures instead of using letters - in fact, Khan Academy does that in some early math videos.
f(0)^2
where f(x)=3x+4
Once you know, f(0), square the result.
You're right otherwise. If you see f(5), you just evaluate with x=5.
See Also
F-statistic calculator